Why doesn’t your 15mm Boost wheel fit your Öhlins DH38? The Öhlins DH38 uses a 20×110 downhill front axle system. Most modern enduro bikes, trail bikes and e-MTBs use 15×110 Boost.
The hub width may be 110mm in both cases, but the axle diameter and fork interface are not the same. That is why your 15×110 Boost wheel cannot simply be installed in your DH38.
The Freakynuts® Öhlins DH38 15mm Adapter is designed to solve that mismatch.

Premium Fork. Favourite Wheel.

A DH38 is usually part of a high-end build. Your front wheel probably is too.
If you already own a premium Boost wheel, buying another complete wheel only because the fork uses a 20mm axle can feel unnecessary.
Freakynuts® allows you to use a compatible 15×110 Boost front wheel with your Öhlins DH38.

Made From 7075 Aluminium

Every Freakynuts® adapter is CNC machined in Germany from premium 7075 aluminium. The material provides excellent strength and stiffness for components that sit directly in the front axle system.
Precise machining also helps keep the wheel positioned correctly and consistently.

Not Just a 20mm to 15mm Sleeve

There is more to the conversion than axle diameter. The hub, fork, axle and adapter have to work together.
That is why the Freakynuts® system is designed as a complete mechanical interface rather than a simple universal reducer.
The objective is precise wheel positioning, secure support and a clean installation.

No Permanent Fork Modification

Your DH38 does not need to be drilled or permanently modified. Your 15×110 Boost wheel also remains compatible with other appropriate Boost forks when the Freakynuts® components are removed.
That means more flexibility from the wheels you already own.

Basic, Pro and Premium

Basic contains the core adapter components.
Pro adds the Freakynuts® KingPin solid 7075 thru axle.
Premium is our most integrated adapter system with fewer individual components and a clean overall installation.

Built for Serious Gravity Bikes

The Öhlins DH38 is designed for downhill racing, bike parks and aggressive gravity riding. Freakynuts® components are developed for riders using their equipment in exactly those environments.
Keep your premium wheel. Ride your DH38.
Freakynuts® Öhlins DH38 15mm Adapter.