{"product_id":"drivetrain-dummy-gear","title":"Drivetrain Dummy Gear | 12mm Thru-Axle | Shockwave Parts","description":"\u003ch2\u003eDrivetrain Dummy\u003c\/h2\u003e\n\u003cp style=\"font-size: 16px; color: #555;\"\u003eRemoving the rear wheel usually turns the drivetrain into a mess. The chain goes slack, rubs the frame, drops everywhere, and makes cleaning or storage annoying. The \u003cstrong\u003eDrivetrain Dummy\u003c\/strong\u003e replaces your rear wheel axle so the chain stays tensioned and the derailleur stays aligned. The bike behaves like there is still a wheel installed, just without the wheel.\u003c\/p\u003e\n\u003c!-- THE REAL PROBLEM --\u003e\n\u003cdetails style=\"background: #f0fdf4; border-left: 6px solid #059669; padding: 1em; margin-top: 1.2em;\"\u003e\u003csummary style=\"font-weight: bold; cursor: pointer;\"\u003eThe problem it solves\u003c\/summary\u003e\n\u003cul style=\"margin-top: 1em;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eDangling chain:\u003c\/strong\u003e without axle support, the chain flops inside the frame and contacts the chainstay.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImpossible backside cleaning:\u003c\/strong\u003e a slack chain won't rotate, so the backside of the links and the jockey wheels stay dirty no matter how hard you scrub.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMessy storage:\u003c\/strong\u003e a bike resting on the saddle and handlebar, or hung by the rear triangle, drags the chain across the frame.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAxle contact:\u003c\/strong\u003e without the axle seated, the chain can scrape directly against the dropout faces.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/details\u003e\n\u003c!-- WHY IT IS GREAT FOR CLEANING --\u003e\n\u003cdetails style=\"background: #eef6ff; border-left: 6px solid #3b82f6; padding: 1em; margin-top: 1.2em;\"\u003e\n\u003csummary style=\"font-weight: bold; cursor: pointer;\"\u003eWhy it makes drivetrain cleaning better\u003c\/summary\u003e\n\u003cp style=\"margin-top: 1em;\"\u003eWith the dummy installed, the chain stays tensioned. You can \u003cstrong\u003epedal normally\u003c\/strong\u003e while scrubbing, degreasing, or wiping the drivetrain. This makes it easy to clean the \u003cstrong\u003ebackside of the chain\u003c\/strong\u003e, jockey wheels, and derailleur cage, which is almost impossible when the chain is loose.\u003c\/p\u003e\n\u003cp\u003eYou clean faster, more thoroughly, and without fighting the drivetrain the whole time.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003c!-- WORKSHOP \u0026 STORAGE USE --\u003e\n\u003cdetails style=\"background: #fff7ed; border-left: 6px solid #f59e0b; padding: 1em; margin-top: 1.2em;\"\u003e\n\u003csummary style=\"font-weight: bold; cursor: pointer;\"\u003eWorkshop \u0026amp; storage benefits\u003c\/summary\u003e\n\u003cp style=\"margin-top: 1em;\"\u003ePerfect when the wheel is off for a while. On a repair stand or resting on the saddle and handlebar, the drivetrain stays tidy. The chain stays where it belongs instead of dragging across the frame or hanging awkwardly.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003c!-- FUNCTIONAL CHECKS --\u003e\n\u003cdetails style=\"background: #f0fdf4; border-left: 6px solid #059669; padding: 1em; margin-top: 1.2em;\"\u003e\n\u003csummary style=\"font-weight: bold; cursor: pointer;\"\u003eShifting and diagnostics\u003c\/summary\u003e\n\u003cp style=\"margin-top: 1em;\"\u003eYou can rotate the cranks and \u003cstrong\u003eshift through gears\u003c\/strong\u003e even without the rear wheel. This is ideal for checking derailleur alignment, cable tension, or shifter function during maintenance without reinstalling the wheel.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003c!-- COMPATIBILITY --\u003e\n\u003cdetails style=\"background: #eef6ff; border-left: 6px solid #3b82f6; padding: 1em; margin-top: 1.2em;\"\u003e\u003csummary style=\"font-weight: bold; cursor: pointer;\"\u003eCompatibility\u003c\/summary\u003e\n\u003cp style=\"margin-top: 1em;\"\u003eDesigned for \u003cstrong\u003e12 mm rear thru-axles\u003c\/strong\u003ethe current standard on modern MTB frames. Slide it in where the wheel axle sits, snug it down, and the drivetrain is ready to use. Removal is just as fast.\u003c\/p\u003e\u003c\/details\u003e\n\u003c!-- WHY IT EARNS A SPOT --\u003e\n\u003cdetails style=\"background: #fefce8; border-left: 6px solid #eab308; padding: 1em; margin-top: 1.2em;\"\u003e\u003csummary style=\"font-weight: bold; cursor: pointer;\"\u003eWhy it earns a permanent spot in the workshop\u003c\/summary\u003e\n\u003cp style=\"margin-top: 1em;\"\u003eAny time the rear wheel comes off, for a tire swap, a brake bleed, or a full drivetrain clean, the Drivetrain Dummy goes in before the wheel goes out. The chain stays tensioned on a 12 mm thru-axle body, the derailleur holds its position, and the cranks keep turning. You stop managing the chain and start doing the actual work.\u003c\/p\u003e\u003c\/details\u003e","brand":"Shockwave Parts","offers":[{"title":"Default Title","offer_id":52794730578284,"sku":"DUM-GEAR","price":13.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0917\/8991\/8572\/files\/Capture_d_ecran_2025-11-03_123359.png?v=1770907046","url":"https:\/\/www.shockwaveparts.com\/products\/drivetrain-dummy-gear","provider":"Shockwave Parts","version":"1.0","type":"link"}