Hydraulic Disc Brake has done the best job on braking performance. The hyraulic braking system works great even poor and dirt condition. Compatible Models with 50cc, 70cc, 90cc, 110cc, and 125cc ATVs and quads. Hand Hydraulic Disc Brakes have braking power be very dosed and controlled unfold and works well on braking precision. It comes as a completed assembly and is a self-contained system. No needed on extra brake fluid and brake pads. Low Maintenance Brake pads can adjust automatically. atv brake caliper kit