The Box One Disc Brake Adapter is designed to improve braking control on frames where disc brakes were not standard. It is compatible with two types of dropouts and 3-10mm hubs, allowing it to fit over your hub’s axle and mate with the frame’s dropout in the correct configurations. This enables the mounting of a standard post-mount disc brake caliper.

Important Notes

• NOT universally compatible: We strongly recommend reading the Compatibility and Installation instructions before purchasing.
• This version is compatible with specific sliding plate dropouts with inserts. Please see the compatibility section for more details.

Features

• Retrofit non-disc brake frames for disc brakes.
• Mates with the frame’s sliding dropout, allowing for the mounting of a standard post-mount disc brake caliper.
• Disc brakes provide improved braking performance compared to rim brakes.

Compatibility

• Box Three Pro Disc Hub
• Box Three Brake Caliper
• Box Three 140mm Disc Brake Rotor
• ALL Box Brake Levers
• Box Linear Brake Cables

Specifications

• Material: 6061-T6 Aluminum
• Process: Extruded & CNC Machined
• Finish: Anodized with Laser-Etched Graphics
• Size: 10mm

Additional Compatibility Details

• Mount: Post Mount Caliper
• Brake Rotor: 140mm
• Hubs: 3-10mm
• Dropout: Sliding
• Weight: 65g
• Rider Weight Limit: 150lbs