Experience superior stopping power and reliability with the Shimano Deore BR-MT420 4-piston disc brake calliper. Engineered for mountain bikers who demand consistent performance on challenging terrain, this calliper offers enhanced modulation and raw braking force. Its 4-piston architecture ensures that you maintain complete control during steep descents and technical sections. Built for longevity and ease of maintenance, the system is fully compatible with Shimano mineral oil, providing a non-corrosive and efficient hydraulic setup that performs consistently in all weather conditions. Whether you are upgrading your current braking system or building a new trail bike, the BR-MT420 provides an ideal balance of durability, power, and precise control. The calliper is designed for seamless integration with existing Deore braking components. Product summary: Shimano Deore BR-MT420, 4-piston hydraulic disc brake calliper, mountain bike disc brake, trail performance, black disc brake calliper.