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Rocky Mounts Drive Shaft Thru Axle Adapter Mount

You have invested serious coin into a fork mount style roof or bed rack, but now have a front thru-axle fork. Although there are adapters available, only Rocky Mounts makes a truly lockable option, allowing you to feel your current set-up is a secure as your older quick release model. Another great feature of the Drive Shaft Thru-Axle Adapter Mount? It comes with shims that for both 15 and 20mm thru-axles, and even the option to purchase shims for a 12mm version.

The snap-in nylon shims not only determine axle fit, but these also protect your thru-axle, clamping down and providing friction without scratching. Rocky Mounts has built a t-style adjuster into the design, so you can ensure the proper amount of friction and control for your axle size. Lever the system closed, then lock the supplied Rocky Mounts Lock Core with the supplied key. This is system is easy to use and the adapter body itself can lay back a little in the 9mm skewer axle of your fork carrier. Small safety tabs provide extra security and won't interfere with the clamping end of the locking skewer. Just mount the Drive Shaft Thru Axle Adapter into your carrier, just as you would a 9mm fork dropout and lock into place. Some roof rack users prefer to mount the adapter to the fork first, but we find once you have it set-up as you prefer, it is easier to mount the adapter to the carrier first, then load the bike. Either way, you can securely transport your thru-axle bike with confidence thanks to Rocky Mounts.


  • Adapter to securely mount thru-axle forks to fork mount bike carriers
  • Compatible with, and equipped with shims, for 15&20mm thru-axles
  • 12mm thru-axles are compatible, shims sold separately
  • T-style adjuster will allow you provide the correct pressure to prevent thru-axle from spinning when locked down, it needs to be adjusted if/when you change shim sizes and should be checked every time you mount the bike
  • Comes with Rocky Mounts specific coded lock core and 2 keys
  • Stiif and strong cast-aluminum base
  • Dropout width does not matter, will work with 100mm or wider when clamped properly
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