Combining a powerful 4-piston caliper, ergonomic BL-MT401 lever, and Shimano's trusted hydraulic technology, the MT420 Disc Brake Set is an outstanding upgrade for riders seeking greater braking confidence on every ride. The BR-MT420's four-piston caliper delivers significantly greater braking force and improved heat management compared to traditional two-piston systems. The result is greater control on steep descents, improved modulation, and increased rider confidence when riding demanding terrain. Tailored for entry MTB riders Sleek design inherited from MTB racing components Anodized alloy 2-finger brake lever Braking power tuned for entry MTB riders Accessible lever reach designed for small hands, Minimum reach 75 mm Long-lasting braking performance Easy, quick and clean installation Funnel bleeding SHIMANO Hydraulic Mineral Oil Balanced braking power 4-Piston Caliper Brake Caliper for Postmount Brake Easy hose joint system (J-kit) Brake pads: D03S Resin without Fin Brake hose: SM-BH90-SS Brake hose lengths: front 1000mm + rear 1700mm (shortable) Recommended brake rotor: SM-RT54, SM-RT56, SM-RT64 (140, 160, 180, 203mm are available separately!) About Shimano Established in Japan in 1921, Shimano is the worlds largest bicycle component manufacturer. Whether it be drive systems, brakes, pedals or shoes, Shimano stands for reliable quality and performance. From Road & Gravel to Mountain, Touring & Urban use, Mechanical or Electric.