Upgrade your drivetrain with the Box One 10mm or 15mm Conversion Rear Axle , built with Oversized Technology™ for maximum performance, strength, and adaptability. Crafted from high- grade 7075- T6 aluminum and CNC lathed for precision, this axle features an anodized finish with laser- etched graphics . Designed to fit oversized frame dropouts, it delivers exceptional steering and pedaling stiffness , perfectly complementing other Oversized™ components. With its convertible design , you can easily adapt a 20mm hub to fit 10mm or 15mm , making it ideal for versatile race setups. Adjustable from 125mm to 165mm , and weighing only 123g ( 10mm) or 86g ( 15mm) , the Box One Conversion Axle is the go- to choice for serious BMX racers seeking rigid performance and reliable compatibility. View Whitepaper: Box® - Stealth Hubs Whitepaper 06.12.25