{"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","url":"https:\/\/ontariotelescope.com\/products\/jmi-5-polyurethane-wheel-upgrade-for-wheeley-bars","provider":"Ontario Telescope and Accessories","version":"1.0","type":"link"}