Get the Shimano Deore BL - M4100/BR - MT420 Disc Brake and Lever for the rear of your mountain bike. These brakes come with gray resin pads and offer high - powered, reliable braking for all MTB riding styles. The brakes are pre - bled, saving you time and hassle. They also include resin brake pads. Here are the tech specs: Post - Mount Brake Caliper, Hydraulic Brake Lever Actuation, Right - hand Brake Lever Use, Black Color, Mineral Oil Hydraulic Fluid, 1700 Hydraulic Hose Length, Resin Pad Compound, and no rotor included.


Using your Shimano Deore BL - M4100/BR - MT420 disc brake and lever is easy. Just squeeze the right - hand lever to apply the brakes. Since the brakes are pre - bled, you can start using them right away. When riding, make sure to adjust the lever position to suit your hand size for maximum comfort. As for maintenance, regularly check the hydraulic fluid level. If it's low, add mineral oil as recommended. Keep the resin pads clean and replace them when they're worn out. Also, inspect the hydraulic hose for any signs of damage. Store your bike in a dry place to prevent corrosion and keep your brakes in top condition.