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  • Thule - Thru-Axle Adapter - One Color
  • Thule - Thru-Axle Adapter - One Color
  • Thule - Thru-Axle Adapter - One Color
  • Thule - Thru-Axle Adapter - One Color
  • Thule - Thru-Axle Adapter - One Color

Current Color

  • Thule - Thru-Axle Adapter - One Color
  • Thule - Thru-Axle Adapter - One Color
  • Thule - Thru-Axle Adapter - One Color
  • Thule - Thru-Axle Adapter - One Color
  • Thule - Thru-Axle Adapter - One Color

Thule Thru-Axle Adapter

22% Off
sale from $46.95 $74.95

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  • Select options
    • One Color, 15mm
      sale $46.95
    • One Color, 12mm
      sale $46.95
    • One Color, 20mm
      sale $46.95
    • One Color, Boost, 15x110
      sale $46.95
    • One Color, Lefty
      sale $58.95


    10 Reviews


    For the big-boy bikes.

    Unfortunately, your 20mm thru-axle won’t mount on your QR-mount bike rack. The Thule Thru-Axle Fork adapter solves the problem quickly, easily, and inexpensively. The Thru-Axle Adapter works on any QR-mount bike rack, regardless of brand.

    • 20mm thru-axle bike compatible
    • Works with any brand
    • Item #THU0321

    Tech Specs

    fork-mounted bike racks
    Recommended Use
    mountain bikes
    Manufacturer Warranty
    limited lifetime

    Tech Specs

    • Reviews
    • Q & A

    What do you think about this product?

    Have questions about this product?

    Gotta have it/Roof rack

    • Familiarity: I've put it through the wringer

    If you are putting your bike on an old school Yakima rack, then you have to have one of these. We have both the Lefty and the 15mm and they work like a charm.

    Going strong

      Like others I think it's too bad that this doesn't lock the axle for security. But a cable lock fills that need without issue. It does swivel a bit if you don't have your skewer Hulk tight. I do like the smooth feel of he plastic inserts. I'm not sure you could have a locking feature at this price point.

      Going strong

      Quick Fix

      • Familiarity: I've used it several times

      With 3 new through axle bikes in our quiver, our Thule fork mount trays needed updating or replacing. Since I own QR mounted wheels I wanted to simply adapt a something that was easy and simple. The Thule Thru Axle Adapter works great! Easy to install on the forks and to engage with my current QR set up on the roof. The only missing feature would be a lock system, but with an optional locking core on the fork mount tray, all set for security and deterrence. Bought two to cover both mounts on the roof.

      Much needed!!!

      • Familiarity: I've used it several times

      If you have a 15mm fork adapted bike rack this is much needed. My only gripe is that most racks lock on the fork, which means that the bike is not secured but the adapter is. Thief gets the bike, you have the adapter.

      Necessary evil

      • Familiarity: I've used it several times

      I had to pick one of these up to work with my Yakima Forklift rack. It does the job and holds a 15mm fork very securely. It's very easy to set up and use, but would be nice to see a cheaper option or one that allows you to lock your bike down. Paired with the Yakima rack, I can lock this adapter to the rack but can't lock the fork to the adapter without throwing a cable lock around the whole mess.

      Bottom line - this works great and is completely necessary, but is possibly the least sexy piece of gear I've spent $$ on in my life.

      My bike has a 15mm axle so I ordered the 15mm adapter. It's a snug fit and definitely wouldn't fit a 20mm axle. I'm sure you could get a 15mm axle into the 20mm adapter, but I suspect that you would get a good bit of wobble in the set up, especially at highway speeds. I've never tried that route and I'm not sure I would recommend it. I think you're best off to get the adapter (15mm, 20mm, or lefty) that matches up with the axle size you have on your bike.

      Works as advertised.

        I got the 15mm version of this to attach a Rocky Mountain Altitude 50 to my buddy's Rocky Mounts TieRod Bike Mount. It works just like I thought it would. My friend has a Rocky Mounts thru-axle adapter and it was a lot more expensive than this one. However, unlike this adapter, it allows you to still lock the bike to the rack. If that were possible with this one, it would have 4 or 5 stars.

        I know this review is old but, I had to comment concerning Rocky Mounts thru axle adaptor. It is heavy duty and does lock. However, it just doesn't work! When I put this on my Rocky Mount Pitch Fork rack, the bike was not stable . I had to use the 15mm adaptor that was included. The bike rolled extensivly backward and forward. The thru axle could not be tightened enough to the rack and the bike axle could not be tightened enough to the thru axle. I'll try the Thule thru axle adaptor and hope all tightens enough.

        Anybody interested in this adaptor should read EXACTLY what KENNETH P wrote above me. All these adaptors (Thule, RockyMount, Hurricane, etc) all have the exact same engineering design where it's impossible to not get the adaptor to rotate forward/backward when driving. They all stink, I've tried them all.