Shimano BR-MT420 4-Piston Hydraulic Rear Disc Brake Set | BL-MT401 Left Lever

Shimano BR-MT420 4-Piston Hydraulic Rear Disc Brake Set | BL-MT401 Left Lever

The Shimano BR-MT420 Hydraulic Rear Disc Brake Set is designed for riders who demand greater stopping power, improved control, and dependable braking performance on technical trails. Featuring a powerful 4-piston BR-MT420 caliper paired with the ergonomic BL-MT401 left-hand brake lever, this complete hydraulic brake system delivers confidence-inspiring braking for trail, enduro, e-MTB, and aggressive mountain biking.

With Shimano's proven One-Way Bleeding technology, mineral oil system, and fully hydraulic performance, the BR-MT420 offers exceptional braking consistency in all riding conditions.

Key Features

• Complete rear hydraulic disc brake set
• Shimano BR-MT420 4-piston caliper
• Shimano BL-MT401 left brake lever
• Powerful 4-piston braking performance
• Up to 90% more braking power than the BR-MT520*
• Approximately 20% more braking power than Shimano MT400 2-piston brakes
• Improved brake pad durability
• Shimano One-Way Bleeding technology
• Shimano mineral oil system
• Post Mount caliper
• Compatible with 140mm–220mm rotors
• Ideal for trail, enduro, e-MTB, and aggressive MTB riding

Powerful 4-Piston Performance

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.

Greater Control on Technical Trails

Designed for aggressive mountain biking, the MT420 provides consistent braking performance across long descents, technical rock gardens, and challenging trail conditions where reliable stopping power matters most.

Ergonomic BL-MT401 Brake Lever

The Shimano BL-MT401 left-hand brake lever offers a comfortable ergonomic design with smooth hydraulic actuation for precise braking control. The lever is engineered to provide excellent modulation and rider comfort across long days on the trail.

Reliable Shimano Hydraulic Technology

Using Shimano's proven mineral oil hydraulic system, the MT420 delivers smooth lever feel, dependable braking consistency, and reduced maintenance requirements over the life of the brake.

Easy Maintenance

Shimano's One-Way Bleeding technology simplifies servicing by making brake bleeding faster, cleaner, and more efficient whenever maintenance is required.

Rotor Compatibility

The BR-MT420 is compatible with a wide range of rotor sizes, allowing riders to tailor braking performance to their riding style.

Compatible rotor sizes include:

• 140mm
• 160mm
• 180mm
• 203mm
• 220mm

Compatible with Shimano SM-RT30, SM-RT54, SM-RT56 and SM-RT64 disc brake rotors.

Built for Modern Mountain Bikes

Whether you're upgrading your trail bike, e-MTB, or enduro machine, the Shimano BR-MT420 delivers the stopping power, durability, and reliability needed for aggressive riding and demanding conditions.

Shimano Braking You Can Trust

Combining a powerful 4-piston caliper, ergonomic BL-MT401 lever, and Shimano's trusted hydraulic technology, the BR-MT420 Rear Disc Brake Set is an outstanding upgrade for riders seeking greater braking confidence on every ride.