Hayes Stroker Trail Disc Brake Caliper and Lever Sets. Both Front and Rear sets Included. V6 RotorsStroker Trail * Aluminum adjuster knob with spring detents provides tool-free lever reach adjustment * Hayes' largest brake pads to date deliver supreme braking power and optimal heat dissipation Stroker Series * All new radial design optimized for strength, light weight and compact size * Lever stroke blends naturally and ergonomically with rider's hand * Insulated caliper pistons control fluid temperature for smooth and consistent brake engagement * Adjustable caliper hose routing allows rider to set ideal hose exit angle for any mounting scenario