The original RockShox Boxxer 15mm Adapter. CNC-machined from 7075 aircraft-grade aluminum in Germany. Compatible with both Boxxer generations. Trusted by thousands of gravity riders worldwide.

Why We Built the RockShox Boxxer Adapter

For years, downhill riders have faced the same problem.

Modern trail, enduro and e-MTB bikes all use 15×110 Boost front wheels, while the legendary RockShox Boxxer still relies on the classic 20×110 downhill axle.

As a result, you have only two choices:

• Buy another expensive front wheel.
• Stop using your favourite wheelset.

We weren’t willing to accept either.

Instead, we engineered a completely new adapter system that lets you mount your existing 15×110 Boost wheel safely in your RockShox Boxxer.

No compromise. No wheel swap. Just ride.

Compatible With Both RockShox Boxxer Generations

Unlike many adapter systems, Freakynuts® offers solutions for more than 2 generations of the RockShox Boxxer.

The older Boxxer Generation

2009 – 2018

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The Current Boxxer Generation

2019 – Current

RockShox redesigned the dropout system in 2019 and this design has not been changed eversince. Our second-generation adapter has been engineered specifically for this platform and remains fully compatible with all current Boxxer forks.

CNC Machined in Germany

Every Freakynuts® adapter is manufactured in Germany using state-of-the-art HAAS CNC machining centres.

Every adapter starts as a solid billet of premium 7075 aircraft-grade aluminium.

We don’t use ordinary aluminium.

We use one of the strongest aluminium alloys available because downhill riding demands maximum strength and absolute precision.

Precision Makes the Difference

A good adapter shouldn’t simply fit.

It should become part of the fork.

That’s why every Freakynuts® adapter is machined to extremely tight tolerances.

The result:

✔ Eliminates play ✔ Delivers perfect clamping force ✔ Keeps steering precise ✔ Improves braking stability ✔ Operates silently

No rattling. No movement. Just confidence.

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No Weak Solutions

Some conversion systems depend on loose spacers or oversized sleeves.

Others require unnecessary modifications.

We chose another path.

Our engineering focuses on precision, stability and proper load distribution.

No gimmicks. No shortcuts. Just a mechanical solution that works.

As we always say: The secret of the blacksmith stays in Munich.

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Three Versions For Every Rider

Basic

Already own a quality 15mm thru axle?

Choose the Basic Adapter.

You receive the precision-machined adapters only. Simple. Affordable. Reliable.

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Pro

Looking for maximum stiffness?

The Pro Kit includes our solid KingPin / HellPin 7075 thru axle.

The Pro is a Basic Kit + a Solid 7075 T6 Alumium Hellpin Axle. (158mm long)

Higher rigidity. Maximum steering precision. Built for riders pushing their equipment every weekend.

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Premium

Want the absolute best? Choose the Premium.

Our flagship version features our innovative two-piece construction that minimizes loose parts while creating an incredibly rigid interface between axle, adapters and fork.

A Two Pcs. System. Better load distribution. Bomb proof.
Designed for everything from local bike parks to Red Bull Rampage-sized lines.

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Available in Multiple Anodized Colours

Performance deserves great looks.

That’s why our RockShox Boxxer adapters are available in multiple premium anodized finishes.

Choose the colour that perfectly matches your bike.

• Black
• Raw Aluminium

More colours continue to follow.

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Tested Worldwide

Thousands of riders across the world already trust Freakynuts®.
Our adapters have seen countless bike parks, downhill tracks and freeride lines.

They’ve been pushed hard.

Again. And again. And again.

Thousands of successful installations.

Thousands of satisfied riders.

One proven system.

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Worldwide Shipping

We ship our adapters worldwide.

No matter where you ride.

🇺🇸 USA Customers

Orders inside the United States are fulfilled through our Colorado warehouse.

That means:

• Free USA Shipping
• No Import Duty
• No Customs Fees
• Faster Domestic Delivery

Visit our dedicated US webshop:

👉 15mmForkAdapters.com

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Why Riders Choose Freakynuts®

✔ Compatible with RockShox Boxxer 2009–2018

✔ Compatible with RockShox Boxxer 2019–Current ✔ CNC machined in Germany ✔ Built on HAAS CNC machines ✔ Made from premium 7075 aircraft-grade aluminium ✔ Extremely tight machining tolerances ✔ Zero play ✔ Installs as a true plug-and-play upgrade ✔ Available in multiple anodized colours ✔ Ships worldwide ✔ Fast shipping from our Colorado warehouse (USA) ✔ Trusted by thousands of riders

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Ride Your Favourite Wheel Again

One wheel. One adapter. Unlimited riding

Whether you’re racing downhill, sending laps in the bike park, chasing podiums, or simply keeping your favourite wheelset in action, this adapter delivers the compatibility you need.

The Freakynuts® RockShox Boxxer Adapter lets you convert your fork without compromise.

Built in Germany.

Trusted worldwide.

Ride without limits.