SRAM HRD/HRR Hydraulic Brake Master Piston Assembly Kit with Piston Plate and Bleed Screw Bicycle Brake Lever Parts

The HRD/HRR Hydraulic Brake Master Piston Assembly Kit contains all the essential components required to restore the functionality and high-level performance of specific SRAM road and gravel bike shifter and brake lever assemblies. This professional-grade repair kit is designed to address internal fluid loss within the lever body by refreshing the master piston seals. By installing these high-quality SRAM hydraulic brake lever parts, riders can ensure restored braking power and significantly reduce the frequency of necessary bleeding procedures.

Precision Brake Restoration and Performance

• Engineered to restore the internal sealing of the master piston within the shifter assembly.

• Effectively stops internal fluid leaks that lead to spongy lever feel and loss of stopping power.

• Reduces the need for frequent hydraulic brake bleeding by maintaining a consistent airtight system.

• Provides a cost-effective alternative to replacing the entire shifter or brake lever body.

• Manufactured by SRAM to meet the exact tolerances of original equipment manufacturer (OEM) specifications.

Comprehensive Repair Kit Components

• Includes a complete master piston assembly with high-performance internal seals.

• Comes with a replacement bleed screw to ensure a perfect seal during the service process.

• Features a new bleed screw o-ring to prevent external leaks at the bleed port.

• Designed for professional mechanics and experienced home users performing hydraulic maintenance.

• Essential for maintaining the long-term reliability of high-end road and gravel groupsets.

Compatibility and Technical Fitment

• SB-RED-HRD-B1 and SB-RED-HRD-B2: Compatible with SRAM RED hydraulic road disc levers.

• SB-FORCE-HRD-A1 and SB-FORCE-HRR-A1: Designed for SRAM Force hydraulic disc and rim brake variants.

• SB-RIVAL-HRD-A1 and SB-RIVAL-HRR-A1: Fits SRAM Rival hydraulic shifting systems.

• SB-700-HRD-B1 and SB-700-HRR-B1: Supports SRAM 700 series hydraulic brake components.

• Optimized for the HydroHC and HRD brake platforms found on modern 11 and 12-speed drivetrains.

Technical Specifications

• Part Type: Master Piston Assembly Rebuild Kit.

• Fluid Compatibility: DOT Hydraulic Fluid (Check SRAM specific model requirements).

• Application: Road and Gravel Hydraulic Disc/Rim Brake Levers.

• Hardware: Includes Bleed Screw and O-Ring.

• Service Interval: Recommended when fluid loss or pressure drops occur within the lever.