The Box Disc Brake Adapter is NOT compatible with all frames, and purchase/installation requires special attention to your frame’s dropouts for compatibility. We do not recommend composite frames for this adapter.

Sliding Plate Dropout - Found on many Thrill, Haro, DK and Stay Strong aluminum frames. 

- Post Mount Caliper Compatibility

- Fits 140mm Brake Rotor Only

- 6061-T6 Aluminum

- Dropout With Insert - 65g

- Fits 3 - 10mm hubs (See Compatibility)

- 150lb Rider Weight Limit