{"title":"JMI Wheeley Bar Accessories","description":"\u003cp\u003eEvery JMI Wheeley Bar can be enhanced, upgraded, and customized to suit your specific observing setup and site conditions. This collection covers the complete range of official JMI Wheeley Bar accessories — from essential safety hardware to all-terrain wheel upgrades, battery management, and full motorized drive.\u003c\/p\u003e\n\n\u003cp\u003eWhether you are rolling across a cracked driveway, through a backyard field, or deploying a fully automated observatory setup, there is an accessory here that makes your Wheeley Bar more capable, more secure, and more suited to your night-by-night conditions.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eAccessory Guide — What Do You Need?\u003c\/h2\u003e\n\n\u003ch3\u003eTie-Down Bracket Kit — Essential for Every Setup\u003c\/h3\u003e\n\u003cp\u003eThe single most important Wheeley Bar accessory. Sturdy steel brackets bolt to your Wheeley Bar frame and heavy-duty ratchet straps cinch over each tripod leg, locking the telescope firmly to the dolly during transport. Without it, a jolt or uneven surface can tip your tripod sideways — potentially destroying expensive equipment.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard Kit:\u003c\/strong\u003e Fits the Medium Universal, HD Medium, HD Large, and Astro-Physics Pier Mount Wheeley Bars\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHalf Kit:\u003c\/strong\u003e Required for the HD Shorty Wheeley Bar only — do not use the standard kit on a Shorty\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eBattery Pack Holders — Keep Power on the Dolly\u003c\/h3\u003e\n\u003cp\u003eMount your field power supply directly to the Wheeley Bar frame so it rolls out with the telescope instead of being carried separately. Heavy-duty steel trays with rimmed edges keep the battery securely in place during transport, even on rough terrain.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard Battery Pack Holder (BRKTBP):\u003c\/strong\u003e Fits battery packs up to 5½″ × 10″. Compatible with all Universal Wheeley Bar models.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBattery Pack Holder XL (BRKTBP-XL):\u003c\/strong\u003e Fits larger packs up to 15¾″ × 11¾″. HD Medium and HD Large only — does not fit the standard Medium or HD Shorty.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWheel Upgrades — Match Your Terrain\u003c\/h3\u003e\n\u003cp\u003eThe standard 2-3\/8″ hard-rubber casters are designed for smooth, flat, hard floors. If your terrain is anything else, upgrade:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e5″ Polyurethane Wheels:\u003c\/strong\u003e Best for hard surfaces with imperfections — cracked concrete, patio pavers, rough aggregate, sidewalk seams. Raises setup ~6″. Lower your tripod 6″ before measuring tip-to-tip if ordering a new Wheeley Bar with this upgrade.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e10″ Pneumatic Wheel Upgrade + Tow Handle:\u003c\/strong\u003e Full all-terrain capability — grass, dirt, gravel, and uneven ground. Includes a tow handle for pulling the loaded rig from the front. Raises setup ~3¼″. Lower your tripod 3.5″ before measuring tip-to-tip. Two versions available — select by leveling screw size (5\/8″ or 1\/2″).\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eMotor Upgrade — Powered Roll-Out\u003c\/h3\u003e\n\u003cp\u003eConverts your existing Wheeley Bar into a motorized telescope dolly. \u003cstrong\u003eRequires both the 10″ Pneumatic Wheel Upgrade and a Battery Pack Holder to be already installed.\u003c\/strong\u003e Two versions available based on your Wheeley Bar's leveling screw mounting style (new style block-thread or old style welded-nut). Contact us before ordering to confirm availability and the correct version for your setup.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eDo I really need the Tie-Down Bracket Kit?\u003c\/strong\u003e\u003cbr\u003e\nYes — for any setup worth protecting. Wheeley Bars are stable at rest, but rolling over uneven surfaces can cause the tripod to shift or tip sideways. The Tie-Down Kit is inexpensive insurance against a very expensive tip-over.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhich Tie-Down Kit do I need — Standard or Half?\u003c\/strong\u003e\u003cbr\u003e\nIf you have an HD Shorty Wheeley Bar, order the Half Kit. For all other Universal models (Medium, HD Medium, HD Large, Astro-Physics Pier), order the Standard Kit.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhich Battery Pack Holder fits my Wheeley Bar?\u003c\/strong\u003e\u003cbr\u003e\nThe standard Battery Pack Holder (BRKTBP) fits all Universal Wheeley Bar models and holds packs up to 5½″ × 10″. The XL (BRKTBP-XL) fits HD Medium and HD Large only and holds packs up to 15¾″ × 11¾″. If you are on an HD Medium or HD Large with legs near minimum extension, use two standard holders side by side instead of the XL.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat is the difference between the 5″ polyurethane and 10″ pneumatic wheel upgrades?\u003c\/strong\u003e\u003cbr\u003e\nThe 5″ polyurethane wheels are for hard surfaces with imperfections — cracked concrete, rough pavers, aggregate paths. They will not work well on grass or gravel. The 10″ pneumatic wheels are full all-terrain tires for grass, dirt, gravel, and uneven ground, and include a tow handle. If your observing surface is consistently flat and hard (even if imperfect), choose the 5″. If you ever go off pavement, choose the 10″.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow do I know if I have 5\/8″ or 1\/2″ leveling screws for the 10″ Pneumatic Upgrade?\u003c\/strong\u003e\u003cbr\u003e\nMeasure the outer diameter of one of your leveling screws with a caliper. All newer HD Medium and HD Large Wheeley Bars use 5\/8″. The standard Medium and older HD models use 1\/2″. When in doubt, contact us before ordering — using the wrong version means the tow handle bracket won't fit correctly.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan I add the Motor Upgrade to my existing Wheeley Bar?\u003c\/strong\u003e\u003cbr\u003e\nYes — provided you already have the 10″ Pneumatic Wheel Upgrade and Battery Pack Holder installed. These are non-negotiable prerequisites. Contact us to confirm availability and the correct motor version for your specific Wheeley Bar model.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan I mix accessories across different Wheeley Bar models?\u003c\/strong\u003e\u003cbr\u003e\nMost accessories are specific to Universal-style Wheeley Bars (Medium, HD Shorty, HD Medium, HD Large, AP Pier). The Battery Pack Holders, Tie-Down Kits, and wheel upgrades are not compatible with Dobsonian-style Sky Trekker or Triangle Wheeley Bar models. When in doubt, contact us with your model name before ordering.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDo I need to modify my Wheeley Bar to install these accessories?\u003c\/strong\u003e\u003cbr\u003e\nNo. All accessories mount using the existing Wheeley Bar hardware. No drilling, welding, or permanent modification is required for any item in this collection.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eI want to add the Motor Upgrade but am not sure where to start. What do I do?\u003c\/strong\u003e\u003cbr\u003e\nStart by confirming your Wheeley Bar model, current wheel configuration, and leveling screw type. Then purchase the 10″ Pneumatic Wheel Upgrade and Battery Pack Holder if not already installed. Once those are confirmed, contact us to order the Motor Upgrade with the correct version for your bar. We recommend contacting us before ordering any part of this chain — we can help you plan the full upgrade path in one conversation.\u003c\/p\u003e","products":[{"product_id":"jmi-wheeley-bar-tie-down-bracket-kit","title":"JMI Wheeley Bar Tie-Down Bracket Kit","description":"\u003cp\u003eSecure your telescope tripod to your JMI Wheeley Bar with this \u003cstrong\u003eTie-Down Bracket Kit\u003c\/strong\u003e. Wheeley Bars are inherently stable, but on uneven surfaces, rough terrain, or during transit, your tripod can tip sideways off the frame — often with catastrophic results for your equipment. This kit prevents that.\u003c\/p\u003e\n\n\u003cp\u003eSturdy steel brackets bolt to your Wheeley Bar using the existing hardware. \u003cstrong\u003eHeavy-duty ratchet straps are included\u003c\/strong\u003e to firmly anchor each tripod leg. Highly recommended for every setup — absolutely essential when rolling over uneven ground with the 10″ pneumatic wheel upgrade.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Tie-Down Bracket Kit attaches to your Wheeley Bar frame at each leg position. Once installed, the ratchet straps loop over each tripod leg and cinch down tight, locking the tripod firmly to the dolly during transport. Removal is quick when you reach your observing position.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWho Is This Product Best For?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eEvery Wheeley Bar owner — this is a safety essential, not an optional upgrade. Particularly critical for imaging setups where a tip-over could damage thousands of dollars of equipment. Essential when using 10″ pneumatic wheels on grass, dirt, or gravel.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat's Included\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSteel mounting brackets (bolt to your Wheeley Bar using existing hardware)\u003c\/li\u003e\n\u003cli\u003eHeavy-duty ratchet straps — one per tripod leg position\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eCompatibility\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard Kit (TPWTDB):\u003c\/strong\u003e Fits the Medium Universal, HD Medium, HD Large, and Astro-Physics Pier Mount Wheeley Bars\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHalf Kit (TPWTDBH):\u003c\/strong\u003e Required for the HD Shorty Wheeley Bar only — the Shorty's shorter leg geometry requires a different bracket configuration\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eSelect the correct version for your Wheeley Bar model. If you are unsure, contact us before ordering.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eImportant Notes\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDo not use the Standard Kit on the HD Shorty — it will not fit correctly\u003c\/li\u003e\n\u003cli\u003eDo not use the Half Kit on Medium, HD Medium, or HD Large models\u003c\/li\u003e\n\u003cli\u003eAlways secure the tie-down straps before moving your Wheeley Bar, especially on any surface other than a perfectly flat garage floor\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo I really need this?\u003c\/strong\u003e\u003cbr\u003e\nYes — for any setup worth protecting. Wheeley Bars are stable at rest, but during movement across uneven surfaces, a tripod can slide or tip sideways. The Tie-Down Bracket Kit is inexpensive insurance for your mount, OTA, and imaging train.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill this slow down my setup\/teardown?\u003c\/strong\u003e\u003cbr\u003e\nThe ratchet straps take about 30 seconds to secure or release per leg. It adds roughly 90 seconds total to your setup routine — a trivial cost for the protection it provides.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this interfere with the 10″ pneumatic wheel upgrade?\u003c\/strong\u003e\u003cbr\u003e\nNo — the bracket kit is fully compatible with all wheel configurations.\u003c\/p\u003e","brand":"JMI","offers":[{"title":"Standard — Medium \/ HD Medium \/ HD Large \/ AP Pier","offer_id":53297182441583,"sku":"TPWTDB","price":140.67,"currency_code":"CAD","in_stock":true},{"title":"Half Kit — HD Shorty Only","offer_id":53297182474351,"sku":"TPWTDBH","price":137.61,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/TDBonHDMED_1024.jpg?v=1781718059"},{"product_id":"jmi-wheeley-bar-battery-pack-holder","title":"JMI Wheeley Bar Battery Pack Holder","description":"\u003cp\u003eKeep your power supply on the move with the \u003cstrong\u003eJMI Wheeley Bar Battery Pack Holder\u003c\/strong\u003e — a heavy-duty steel mounting tray that bolts directly to your Universal Wheeley Bar frame, putting your battery pack right where you need it during transport and at the observing site.\u003c\/p\u003e\n\n\u003cp\u003eMade from the same heavy-gauge welded steel as the Wheeley Bars themselves, the Battery Pack Holder features a \u003cstrong\u003erimmed edge\u003c\/strong\u003e to keep your battery pack securely in place during transport. No more draping cords across the floor or hunting for somewhere to set the power supply when you roll out.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Battery Pack Holder mounts to the cross-bar of a Universal Wheeley Bar using the existing hardware. Compatible with the most popular field power supplies and battery packs. Holds packs up to \u003cstrong\u003e5½″ × 10″\u003c\/strong\u003e in size.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWho Is This Product Best For?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAny Wheeley Bar owner who uses a field battery — dew heater controllers, mount hand controllers, cameras, or powered focusers all need power. Keeping the battery on the Wheeley Bar means one less thing to carry, one less cable to manage, and no more bending down to plug in or unplug at the start and end of every session.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhy Choose This Product?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eKeeps your battery pack on the dolly:\u003c\/strong\u003e Integrates power into your roll-out workflow — no separate battery carry step.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy-duty steel with rimmed edge:\u003c\/strong\u003e Battery stays put during movement, even on rough surfaces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUSA-made JMI quality:\u003c\/strong\u003e Same construction standard as the Wheeley Bar itself.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasy installation:\u003c\/strong\u003e Bolts to existing Wheeley Bar hardware — no drilling or modification required.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMaximum battery pack size: 5½″ × 10″\u003c\/li\u003e\n\u003cli\u003eMaterial: Heavy-duty welded steel\u003c\/li\u003e\n\u003cli\u003eCompatible with: Medium Universal and all Heavy-Duty Universal Wheeley Bars\u003c\/li\u003e\n\u003cli\u003eSKU: BRKTBP\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eImportant Notes\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFor larger battery packs (up to 15¾″ × 11¾″), see the \u003cstrong\u003eBattery Pack Holder XL (BRKTBP-XL)\u003c\/strong\u003e — but note the XL does not fit the standard Medium Wheeley Bar\u003c\/li\u003e\n\u003cli\u003eBattery pack not included\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill this fit my specific battery pack?\u003c\/strong\u003e\u003cbr\u003e\nThe standard holder accepts packs up to 5½″ wide × 10″ long. Measure your battery pack before ordering. For larger packs, see the Battery Pack Holder XL.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it fit the Triangle-Style or Sky Trekker Wheeley Bars?\u003c\/strong\u003e\u003cbr\u003e\nNo — this holder is designed for Universal-style (tripod-mount) Wheeley Bars only.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I run two of these side by side?\u003c\/strong\u003e\u003cbr\u003e\nYes — two standard holders can be mounted on an HD Medium or HD Large if the XL holder would be too wide for your leg extension.\u003c\/p\u003e","brand":"JMI","offers":[{"title":"Default","offer_id":53297182933103,"sku":"BRKTBP","price":82.57,"currency_code":"CAD","in_stock":true}]},{"product_id":"jmi-battery-pack-holder-xl-for-wheeley-bars","title":"JMI Battery Pack Holder XL for Wheeley Bars","description":"\u003cp\u003eThe \u003cstrong\u003eJMI Battery Pack Holder XL\u003c\/strong\u003e is the oversized version of the standard Battery Pack Holder — built for larger field power stations and battery packs that won't fit the regular tray. Mounts directly to your HD Medium or HD Large Universal Wheeley Bar frame using existing hardware, keeping your power supply securely on the dolly during transport.\u003c\/p\u003e\n\n\u003cp\u003eSame heavy-duty welded steel construction and rimmed-edge design as the standard model, scaled up to accept significantly larger packs up to \u003cstrong\u003e15¾″ × 11¾″\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Battery Pack Holder XL attaches to the cross-bar of an HD Medium or HD Large Wheeley Bar. The rimmed steel tray keeps the battery secure during movement. Installation uses the existing Wheeley Bar hardware — no drilling or modification required.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWho Is This Product Best For?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eImagers running larger power stations — Jackery, Goal Zero Yeti, or similar sized units — on heavy HD Medium or HD Large setups. If your battery pack exceeds 5½″ × 10″, this is the right holder.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhy Choose This Product?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits large power stations:\u003c\/strong\u003e Accepts packs up to 15¾″ × 11¾″ — no compromising on power capacity at the field.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy-duty rimmed steel tray:\u003c\/strong\u003e Battery stays put even on rough terrain.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounts using existing hardware:\u003c\/strong\u003e No modification to your Wheeley Bar needed.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eUSA-made JMI construction.\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMaximum battery pack size: 15¾″ × 11¾″\u003c\/li\u003e\n\u003cli\u003eMaterial: Heavy-duty welded steel\u003c\/li\u003e\n\u003cli\u003eCompatible with: HD Medium and HD Large Universal Wheeley Bars only\u003c\/li\u003e\n\u003cli\u003eSKU: BRKTBP-XL\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eImportant Notes\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDoes not fit the standard Medium Wheeley Bar\u003c\/strong\u003e — use the standard Battery Pack Holder (BRKTBP) instead\u003c\/li\u003e\n\u003cli\u003eWill not fit HD Medium or HD Large Wheeley Bars with legs near minimum extension — if your legs are close to minimum, consider two standard Battery Pack Holders side by side instead\u003c\/li\u003e\n\u003cli\u003eBattery pack not included\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy won't it fit near minimum leg extension?\u003c\/strong\u003e\u003cbr\u003e\nAt minimum extension, the cross-bar spacing on the HD models narrows, leaving insufficient clearance for the wider XL tray. Extend your legs to a wider setting or use two standard-size holders instead.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use this on the HD Shorty?\u003c\/strong\u003e\u003cbr\u003e\nNo — the HD Shorty's leg geometry is too compact for the XL holder. Use the standard Battery Pack Holder on HD Shorty setups.\u003c\/p\u003e","brand":"JMI","offers":[{"title":"Default","offer_id":53298010685551,"sku":"BRKTBP-XL","price":168.19,"currency_code":"CAD","in_stock":true}]},{"product_id":"jmi-5-polyurethane-wheel-upgrade-for-wheeley-bars","title":"JMI 5″ Polyurethane Wheel Upgrade for Wheeley Bars","description":"\u003cp\u003eUpgrade your JMI Universal Wheeley Bar from the standard 2-3\/8″ hard-rubber casters to \u003cstrong\u003e5″ fully locking polyurethane wheels\u003c\/strong\u003e. The larger diameter rolls smoothly over cracked concrete, sidewalk seams, rough pavement, and cobblestone-like surfaces that the smaller standard wheels would jar and catch on.\u003c\/p\u003e\n\n\u003cp\u003eThis is the ideal upgrade for observers rolling their rig across a driveway, patio, or walkway with imperfect surfaces — surfaces too rough for the 2-3\/8″ wheels but not requiring full all-terrain capability. \u003cstrong\u003eRaises your setup approximately 6″\u003c\/strong\u003e — account for this when measuring tip-to-tip distance for your tripod fit.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIncludes three (3) fully locking 5″ diameter polyurethane caster wheels to replace the standard 2-3\/8″ wheels on your Universal Wheeley Bar. Polyurethane construction gives a smooth, quiet roll on hard surfaces while being firm enough to stay stable under load.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWho Is This Product Best For?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eObservers rolling a Wheeley Bar over driveways, patios, or paths with surface imperfections — cracks, seams, gravel dust, rough aggregate. If the standard casters feel like they're fighting the surface on the way out, this upgrade solves it. If you need to go off pavement entirely onto grass or gravel, choose the 10″ Pneumatic Wheel Upgrade instead.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhy Choose This Product?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSmooth roll over surface imperfections:\u003c\/strong\u003e 5″ diameter spans cracks and seams that stop smaller casters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully locking:\u003c\/strong\u003e Locks securely at your observing position — no creep or drift.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePolyurethane construction:\u003c\/strong\u003e Durable, quiet, and floor-friendly.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eUSA-made by JMI.\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eWheel diameter: 5″\u003c\/li\u003e\n\u003cli\u003eQuantity: 3 wheels\u003c\/li\u003e\n\u003cli\u003eLocking: Yes — all three wheels lock independently\u003c\/li\u003e\n\u003cli\u003eSetup height increase: approximately 6″ above ground\u003c\/li\u003e\n\u003cli\u003eCompatible with: Medium Universal, HD Shorty, HD Medium, and HD Large Universal Wheeley Bars\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eImportant Notes\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBecause these wheels raise the setup ~6″, \u003cstrong\u003elower your tripod 6″ before measuring tip-to-tip\u003c\/strong\u003e if you are sizing a new Wheeley Bar with these wheels\u003c\/li\u003e\n\u003cli\u003eFor use on grass, dirt, or gravel, choose the \u003cstrong\u003e10″ Pneumatic Wheel Upgrade\u003c\/strong\u003e instead — polyurethane wheels are for hard or semi-hard surfaces only\u003c\/li\u003e\n\u003cli\u003eThis is an upgrade kit for an existing Wheeley Bar — not a standalone product\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo these replace the standard casters?\u003c\/strong\u003e\u003cbr\u003e\nYes — the 5″ polyurethane wheels replace the stock 2-3\/8″ hard-rubber casters on your Wheeley Bar.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill these work on grass?\u003c\/strong\u003e\u003cbr\u003e\nNo. Polyurethane wheels are for hard and semi-hard surfaces only. For grass, dirt, or gravel, choose the 10″ Pneumatic Wheel Upgrade with tow handle.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo I need to adjust my tip-to-tip measurement?\u003c\/strong\u003e\u003cbr\u003e\nYes. These wheels raise your entire setup approximately 6″. If measuring a new Wheeley Bar purchase, lower your tripod 6″ before measuring tip-to-tip.\u003c\/p\u003e","brand":"JMI","offers":[{"title":"Default","offer_id":53298010882159,"sku":"TPW5WH","price":183.48,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/DSC_8357.jpg?v=1781737754"},{"product_id":"jmi-10-pneumatic-wheel-upgrade-tow-handle-for-wheeley-bars","title":"JMI 10″ Pneumatic Wheel Upgrade + Tow Handle for Wheeley Bars","description":"\u003cp\u003eTake your JMI Wheeley Bar completely off pavement with the \u003cstrong\u003e10″ Pneumatic Wheel Upgrade\u003c\/strong\u003e. These large all-terrain rubber tires replace the standard casters and open up grass, dirt, gravel, and uneven ground — dark-sky fields, backyard pads on natural ground, or any site where the hard-surface wheels won't cut it.\u003c\/p\u003e\n\n\u003cp\u003eThe kit includes six 10″ pneumatic wheels and a \u003cstrong\u003etow handle\u003c\/strong\u003e — a rear pull bar that attaches to the steering axle so you can pull the loaded dolly across terrain rather than pushing from behind. A dual inboard wheel design on the rear axle maintains a narrow overall profile through doorways.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe 10″ Pneumatic Wheel Upgrade replaces the existing wheels (standard 2-3\/8″ or 5″ polyurethane) with six large air-filled rubber tires. The tow handle mounts to the rear steering axle. Height increase above ground is approximately 3¼″ — lower than the 5″ polyurethane upgrade despite the larger tire size, due to the pneumatic tire profile.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eTwo Versions — Select Carefully\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe correct version depends on your Wheeley Bar's leveling screw size. Check before ordering:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e5\/8″ Leveling Screws (TPW10HD):\u003c\/strong\u003e All newer HD Medium and HD Large Wheeley Bars. If your bar was purchased in recent years, this is almost certainly correct.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1\/2″ Leveling Screws (TPW10):\u003c\/strong\u003e Standard Medium Wheeley Bars and older HD Medium\/HD Large models. Measure the diameter of your leveling screws to confirm.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIf you are unsure which version you have, contact us — ordering the wrong version means the tow handle bracket won't align correctly.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWho Is This Product Best For?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAnyone observing on grass, gravel, dirt, or any natural surface. Especially useful for dark-sky site users who need to roll their rig across uneven ground from a parking area to a field pad. Also the required prerequisite for the Motor Upgrade.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhy Choose This Product?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull all-terrain capability:\u003c\/strong\u003e Grass, dirt, gravel, and rough ground — no surface limitation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTow handle included:\u003c\/strong\u003e Pull from the front rather than push from behind — much easier across rough ground.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNarrow profile:\u003c\/strong\u003e Dual inboard rear wheels keep the overall width manageable through doorways.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRequired for Motor Upgrade:\u003c\/strong\u003e You must have the 10″ wheels before adding the motorized drive.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eUSA-made by JMI.\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eWheel diameter: 10″ pneumatic all-terrain rubber\u003c\/li\u003e\n\u003cli\u003eQuantity: 6 wheels (dual inboard on rear axle)\u003c\/li\u003e\n\u003cli\u003eHeight above ground: approximately 3¼″\u003c\/li\u003e\n\u003cli\u003eTip-to-tip adjustment: lower tripod 3.5″ before measuring if sizing a Wheeley Bar with this upgrade\u003c\/li\u003e\n\u003cli\u003eCompatible with: Medium Universal, HD Medium, and HD Large Universal Wheeley Bars\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eImportant Notes\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eNot compatible with the HD Shorty Wheeley Bar\u003c\/li\u003e\n\u003cli\u003eJMI will not accept returns of removed small wheels — the small wheels are traded in toward the upgrade price\u003c\/li\u003e\n\u003cli\u003eAftermarket installation option available for units with bolt-on wheels (current manufacturing); riveted wheels (very old units) cannot use this kit — contact us if unsure\u003c\/li\u003e\n\u003cli\u003eYou \u003cstrong\u003emust\u003c\/strong\u003e also have the Battery Pack Holder installed before adding the Motor Upgrade\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow do I know if I have 5\/8″ or 1\/2″ leveling screws?\u003c\/strong\u003e\u003cbr\u003e\nUse a caliper or ruler to measure the outer diameter of one of your leveling screws. Newer HD Medium and HD Large bars have 5\/8″. Standard Medium and older HD bars have 1\/2″. When in doubt, contact us before ordering.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the tow handle replace the leveling screws?\u003c\/strong\u003e\u003cbr\u003e\nNo — the tow handle attaches to the steering axle at the rear of the Wheeley Bar. Leveling screws remain installed normally.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I still use the Tie-Down Bracket Kit with these wheels?\u003c\/strong\u003e\u003cbr\u003e\nYes — and you absolutely should. The Tie-Down Kit is essential when rolling over uneven terrain with any wheel configuration.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs the Motor Upgrade available?\u003c\/strong\u003e\u003cbr\u003e\nYes — contact us for availability. The 10″ pneumatic wheels and Battery Pack Holder are required prerequisites for the motor upgrade.\u003c\/p\u003e","brand":"JMI","offers":[{"title":"5\/8″ Leveling Screws — Newer HD Medium \/ HD Large","offer_id":53298011242607,"sku":"TPW10HD","price":384.29,"currency_code":"CAD","in_stock":true},{"title":"1\/2″ Leveling Screws — Medium \/ Older HD Models","offer_id":53298011275375,"sku":"TPW10","price":384.29,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/tpw_lw10-2_4c4ad5d5-1029-496f-aac4-bd2fbfa961e7.jpg?v=1781737789"},{"product_id":"jmi-motor-upgrade-for-universal-wheeley-bars","title":"JMI Motor Upgrade for Universal Wheeley Bars","description":"\u003cp\u003eThe \u003cstrong\u003eJMI Motor Upgrade\u003c\/strong\u003e adds a motorized drive to your existing Universal Wheeley Bar, converting it into a powered telescope dolly. Rather than pushing or pulling your loaded imaging rig manually, the motor does the work — ideal for heavy setups, long transit distances, limited mobility situations, or backyard observatories where powered roll-out is part of an automated workflow.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003ePrerequisites — Required Before Ordering\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Motor Upgrade cannot be installed without both of the following already on your Wheeley Bar:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e10″ Pneumatic Wheel Upgrade\u003c\/strong\u003e — required (motor drives the rear pneumatic wheels)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBattery Pack Holder\u003c\/strong\u003e — required (motor draws power from a battery mounted on the dolly)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eDo not order the Motor Upgrade without confirming both items are already installed on your Wheeley Bar.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eTwo Versions — Select by Leveling Screw Type\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Style (TPWMTR-NLS-UPG):\u003c\/strong\u003e For Wheeley Bars with leveling screws that thread through a metal block in the leg — current manufacturing standard.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOld Style (TPWMTR-OLS-UPG):\u003c\/strong\u003e For Wheeley Bars with leveling screws that thread through a nut welded onto the end of the leg — older manufacturing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eInspect your Wheeley Bar leg ends to determine which version you have. If unsure, contact us with a photo before ordering.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWho Is This Product Best For?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eObservers and imagers with heavy rigs who regularly cover significant distances between storage and observing position — particularly those with physical limitations, very heavy setups, or permanent observatory configurations. Also suited for automated roll-out workflows at semi-permanent dark-sky sites.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCurrent Availability\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Motor Upgrade is subject to availability and lead times. Contact us before ordering to confirm stock and lead time. We will advise on the correct version for your specific Wheeley Bar model and configuration.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I add this to any Wheeley Bar?\u003c\/strong\u003e\u003cbr\u003e\nOnly Universal-style Wheeley Bars (Medium, HD Medium, HD Large) with 10″ pneumatic wheels and a Battery Pack Holder already installed. Not compatible with Dobsonian-style Sky Trekker or Triangle models.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it require any wiring or electrical work?\u003c\/strong\u003e\u003cbr\u003e\nThe motor kit is a self-contained add-on that connects to your battery pack on the dolly. No permanent wiring or electrical installation is required beyond the mounting hardware.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat battery pack do I need?\u003c\/strong\u003e\u003cbr\u003e\nAny standard field astronomy battery pack that fits the Battery Pack Holder and supplies sufficient current. Contact us for specific recommendations based on your setup.\u003c\/p\u003e","brand":"JMI","offers":[{"title":"New Style — Block-Thread Leveling Screws","offer_id":53298011439215,"sku":"TPWMTR-NLS-UPG","price":1177.3,"currency_code":"CAD","in_stock":true},{"title":"Old Style — Welded-Nut Leveling Screws","offer_id":53298011471983,"sku":"TPWMTR-OLS-UPG","price":1177.3,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/doublebattery-1_9ec7dab3-faa9-4e02-a817-b51a7deaa8fa.jpg?v=1781737816"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/collections\/5_8__2.jpg?v=1781737859","url":"https:\/\/ontariotelescope.com\/collections\/jmi-wheeley-bar-accessories.oembed","provider":"Ontario Telescope and Accessories","version":"1.0","type":"link"}