If you want to get the younger rider trying a Disc Brake, the new Tekro is the way to start them off. With it's small lever and short reach it is designed for small hands, and is perfect for the Supercross BMX Vision F1 and the Vision RSX Frames. The Tektro HD-J285 Junior disc brake and lever set is an open system, dual piston hydraulic post mount brake that's designed for youth bikes or individuals that desire a lever with a shorter reach.