TRP's Hylex RS is a full hydraulic single speed disc brake system designed for road and CX bikes. It's built for single speed aficionados who want simplicity without sacrificing braking performance. The lever features ergonomic and perfectly sized hoods that create a natural extension from the rider's hands to the bike. It sports an integrated master cylinder within the low-profile ergonomically shaped lever body. A drilled out lever blade shaves weight and improves grip. Note that the rotor and adaptor are sold separately.