MTB fork adapter for
15mm to 20mm conversion.
Run your 15mm wheel in 20mm downhill forks.
No new wheel. No hassle.
Most 15mm wheels don’t fit 20mm downhill forks.
This adapter fixes that instantly.
More than Products.
JUST BETTER SOLUTIONS.
At Freakynuts, we don’t just make products, we create solutions for riders who want to get more from their existing setup.
We focus on the small details others overlook, improving the parts of your bike that matter most on the trail.
Built by riders, for riders who want more out of their setup.
New / Latest Drops
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Dirt jump peg axle mount Rockshox Pike. Pre Order Now – incl. Axle
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Fox 40 15mm Adapter – Premium Black – incl. Axle
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Fox Podium 15mm Adapter – Premium Black – incl. Axle
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Freakynuts® Endgame Brake Lever Kit fits shimano
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Marzocchi Bomber Boost/Non-Boost – Premium Raw – incl. Axle
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Rockshox Boxxer 2019–2026 – Premium Black – incl. Axle
Why it works
Engeneered to fit.
Built to last.
Engineered to solve a real problem. Built to perform. No compromises.
Same Day Shipping
Ships the same day. No delays
1000+ Happy Riders
Trusted by riders worldwide
World Cup track Tested
Proven on real downhill tracks
Aircraft Alumium
Precision CNC machined
CHOOSE YOUR
FORK
Choose your fork. Find your 15mm adapter.
What Riders say
Max
“Awesome product! A really cool solution that saves so much time and money. I personally have multiple bikes and three Boxxer forks… Thanks a lot!”
DH
“Awesome concept! I actually had to buy a new rim after switching forks, so I ended up with two different wheelsets, which was really frustrating. With this adapter, I can finally keep using my original wheelset.”
Yannick L
“The Fox40 Adapter makes my life much simpler. I now dont have to carry around 4 front wheels for my DH and Enduro to be prepared for muddy and dry soil. The Team was really helpful in improving the product upon request. Thanks a lot!”
Tested across some of Europe’s toughest bike parks — including Bikepark Leogang, Bikepark Samerberg, Bikepark Geisskopf, and Bike Republic Sölden.
And guess what?
Not a single sign of wear and tear!
