Box components Box One BMX Disc Brake Adaptor Rear Sliding Dropout Black 10mm

BOX One BMX Disc Brake Adapter - Sliding Plate Dropout 10mm For Post Mount Calipers. The Box Disc Brake Adapter is designed to help improve braking control on frames where disc brakes were not standard. It goes over your hubΓÇÖs axle and mates with the frameΓÇÖs dropout allowing mounting of a standard post mount disc brake caliper.