Freakynuts®

SR Suntour RUX38 15mm Adapter

Why doesn’t your 15mm Boost wheel fit your SR Suntour RUX38? The answer is simple. Your enduro, trail or e-MTB wheel uses a 15×110 Boost axle. The SR Suntour RUX38 uses a 20×110 downhill axle system.
Both may use a 110mm hub width, but the axle diameter and fork interface are different. A 15mm wheel therefore cannot simply be installed in the 20mm fork.
The Freakynuts® RUX38 15mm Adapter bridges that difference.

15×110 Boost Wheel in a 20×110 DH Fork

That is exactly what the Freakynuts® system is designed to achieve. Instead of buying another complete downhill front wheel, you can continue using a compatible 15×110 Boost wheel.
That can save you from buying another rim, hub, tyre, brake rotor and tubeless setup purely because your new fork uses a different axle.

how mount a 15mm wheel in a dh fork with 20mm

CNC Machined From 7075 Aluminium

The axle area of a downhill bike is not the place for soft materials and loose tolerances. Freakynuts® adapters are CNC machined in Germany from premium 7075 aluminium.
The result is a strong, stiff and precisely manufactured component designed for demanding MTB use.

Accurate Wheel Positioning

The job of the adapter is not just to make the axle smaller. The wheel still has to sit accurately inside the fork.
The Freakynuts® system is designed around correct positioning and support of the complete assembly. That means precise components instead of an oversized universal sleeve.

Keep Your Fork Original

No cutting. No drilling. No irreversible fork modification.
The Freakynuts® system allows you to adapt the wheel interface while keeping your RUX38 and 15×110 Boost wheel fundamentally original.

Two Versions

Choose Basic if you already have a suitable 158mm compatible axle.
Choose Pro for the adapter combined with our KingPin solid 7075 thru axle.

Made for RUX38 Riders

Bike park laps. Downhill tracks. Freeride. Hard landings. Fast braking sections.
The RUX38 is designed for serious gravity riding, and Freakynuts® components are developed with the same environment in mind.
Use your 15×110 Boost wheel in your SR Suntour RUX38. Ride more. Buy fewer wheels.

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