Bolt-on rear brake upgrade for the Surron Light Bee X and E-Ride Pro 2.0. Includes a pre-bled brake assembly, 6061-T6 aluminum bracket, and a 240mm stainless rotor — no sourcing individual parts. Bracket - CNC-machined 6061-T6 aluminum; available in Black or Silver Brake assembly - rear caliper, brake line, and master cylinder; ships pre-bled and ready to install Rotor - 240mm × 3.3mm stainless steel Fitment caveat - fits E-Ride Pro 3.0/SR with bracket modification (see install instructions); Ventus 1 and 79Bike require drilling/widening the axle hole; rotor is not compatible with E-Ride Pro 3.0/SR — a different rotor is needed What's in the Box caliper bracket (black or silver) rear brake caliper, brake line, and master cylinder (pre-bled) 240mm × 3.3mm stainless steel rotor keychain