{"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","url":"https:\/\/ontariotelescope.com\/products\/jmi-10-pneumatic-wheel-upgrade-tow-handle-for-wheeley-bars","provider":"Ontario Telescope and Accessories","version":"1.0","type":"link"}