Description
Fox 15mm Premium Adapter Kit
Ride Your Existing 15×110 Boost Wheel in Your Fox Fork
Already riding Fox 40 or planning to do so, but don’t want to spend hundreds of dollars on a second front wheel?
You’re not alone.
The Fox40 forks use a 20mm axle standard, which means your trusted 15×110 Boost wheel no longer fits.
Instead of buying another wheel, rebuilding your hub or carrying multiple wheelsets to every bike park, the Freakynuts Premium Adapter Kit lets you keep riding the wheel you already know and trust.
Designed, engineered and precision CNC-machined in Germany from aerospace-grade 7075-T6 aluminum, the Premium Kit represents the latest evolution of Freakynuts engineering.
Built by riders.
Made in Germany.
Tested where it actually matters.
★ Why Thousands of Riders Choose Freakynuts
✔ Ride your existing 15×110 Boost wheel
✔ No expensive second wheel
✔ No hub conversion
✔ Precision CNC-machined in Germany
✔ Aerospace-grade 7075-T6 aluminum
✔ World Cup & Bike Park tested
✔ Ships fast from Colorado, USA
▶ Watch Installation (Less Than One Minute)
Why Choose The Freakynuts Premium Kit?
Keep The Wheel You Already Trust
Your wheel already performs exactly the way you like it.
Why replace it?
The Freakynuts Premium Adapter lets you continue riding your existing 15×110 Boost wheel without rebuilding your hub or investing in another expensive downhill wheel.
Less money.
Less hassle.
More riding.
Designed Specifically For Modern Fox Forks
Unlike universal spacers, every Freakynuts adapter is purpose-built for the latest Fox downhill platform.
The revolutionary Fox 40, our Premium Kit delivers an exceptionally precise fit and reliable performance.
The Ultimate Two-Piece Design
The Premium Kit is our newest and most advanced adapter system.
Unlike traditional three-piece designs, our exclusive two-piece construction reduces the number of individual components while making installation faster, cleaner and easier.
Fewer parts.
Less assembly.
Maximum precision.
German CNC Precision
Every Premium Adapter is CNC-machined in Germany using premium 7075-T6 aircraft-grade aluminum.
Every thread.
Every surface.
Every tolerance.
Engineered to deliver a perfect fit every single time.
Includes Our Solid HellPin Axle
Every Premium Kit includes the Freakynuts HellPin.
Machined from solid aerospace-grade 7075-T6 aluminum, the HellPin delivers exceptional stiffness, outstanding durability and maximum confidence under the toughest riding conditions.
Unlike conventional hollow axles, the HellPin was engineered specifically for aggressive Trail, Enduro, Freeride and Downhill riding.
Real World Tested
We don’t believe laboratory testing tells the whole story.
Every Freakynuts prototype is ridden under real-world conditions on demanding trails, bike parks and World Cup downhill tracks—including the legendary Leogang World Cup course.
Thousands of hours of aggressive riding.
Zero structural failures.
Fast Installation
No hub conversion.
No expensive wheel rebuild.
No complicated tools.
Install the threaded adapter.
Insert your wheel.
Slide in the HellPin axle.
Tighten.
Ride.
Installation takes only a few minutes.
Why Choose Premium?
The Premium Kit is designed for riders who simply want the best.
It combines our latest two-piece adapter technology with the solid HellPin axle to create the cleanest, strongest and easiest-to-install Freakynuts system we’ve ever built.
Available in:
✔ Premium Black Anodized
✔ Premium Raw Anodized
Key Features
✔ Fits modern Fox 40 forks
✔ Converts 20mm Boost to 15×110 Boost
✔ Exclusive two-piece adapter system
✔ Includes solid Freakynuts HellPin axle
✔ CNC-machined in Germany
✔ Aerospace-grade 7075-T6 aluminum
✔ World Cup & Bike Park tested
✔ Premium protective packaging
✔ Official Freakynuts sticker included
✔ Premium velvet storage pouch included
✔ Fast shipping from Colorado, USA
Compatibility
Compatible with virtually every major 15×110 Boost front hub including:
• DT Swiss
• Hope
• Industry Nine
• Chris King
• Newmen
• Reserve
• Race Face
• Crankbrothers
• Bontrager
• Spank
…and many more.
Why Freakynuts?
Freakynuts wasn’t created to sell adapters.
It was created to solve one of the biggest frustrations mountain bikers face when upgrading to modern downhill forks.
We wanted to keep riding the wheels we already trusted.
So we engineered a better solution.
Every Freakynuts adapter is designed, manufactured and tested with one simple mission:
Keep riders on the wheels they already love.
No gimmicks.
No compromises.
Just precision engineering that works.
Ready To Ride?
Stop buying extra wheels.
Stop rebuilding hubs.
Keep riding the wheel you already trust.
Install your Freakynuts Premium Adapter Kit in minutes and experience the smartest wheel conversion available today.
Ride more. Ride smarter. Ride Freakynuts.









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