The SRAM Force eTap AXS D2 HRD [paid link] brake sets represent a fusion of hydraulic braking and wireless electronic shifting, purpose-built for precision, integration, and reliability in modern road cycling. This second-generation model in the eTap AXS family incorporates several engineering refinements that affect everything from braking consistency to ergonomic fit, making it a premium component for both racers and endurance cyclists.
Tools Required:
- 4mm and 5mm hex wrenches
- T10 and T25 Torx keys
- Torque wrench with Nm settings
- Hydraulic brake fluid (DOT 5.1)
- Bleed kit (SRAM Bleeding Edge compatible)
- Internal routing tools (if applicable)
- Clean workspace and protective gloves
Design and Engineering Improvements in Force eTap AXS D2 HRD
The Force eTap AXS D2 HRD features updated ergonomics, a revised master cylinder, and a sleeker lever design. The lever body is smaller and more refined, offering a better grip profile for a wide range of hand sizes. These changes improve comfort during long rides and sprint efforts alike. SRAM has reengineered the shifting paddle to deliver faster feedback and clearer indexing, which enhances control and intuitiveness.
The hydraulic caliper remains flat-mount and features a two-piston design optimized for consistent power. Heat management has also been improved, minimizing fade during prolonged descents.
Installation of the Force eTap AXS D2 HRD Brake Set
Installing this brake set requires attention to frame compatibility and internal routing. The calipers are flat-mount, and most modern frames support this configuration.
Mount the levers onto the drop bars, ensuring they are aligned at a comfortable angle relative to your preferred hand position. Secure them using the appropriate torque—usually 6-8Nm. Route the hydraulic hoses through the frame using internal guides where applicable. Calipers should be positioned over the rotor and torqued to 6Nm on flat-mount adapters.
Brake hose length must be adjusted before connecting. Cut the hose to length, install the barb and olive, and attach to the lever using the threaded insert. Finally, bleed the system using SRAM’s Bleeding Edge process to remove air bubbles.
Adjustment of Lever and Caliper Settings
The Force eTap AXS D2 HRD allows precise lever position and reach adjustment. Use the 2mm hex key to adjust reach to match hand size or personal preference. Pad contact can also be fine-tuned via the Contact Point Adjustment dial on the lever body. This dial moves the pads closer or further from the rotor, allowing modulation customization.
Caliper alignment is crucial. Spin the wheel and lightly apply the brake while tightening the caliper bolts to center it. If rubbing persists, inspect for rotor warping or uneven piston return.
Maintenance and Service Intervals
Routine maintenance ensures optimal performance. Brake fluid should be replaced every 12 months or after any major bleed. Inspect pads for wear every 1,000 kilometers; replace if less than 1mm remains. Keep rotors clean using isopropyl alcohol.
The lever internals are sealed, but regular checks for play or resistance in the levers can help identify early wear or contamination. If braking feel becomes spongy, air may have entered the system, requiring a re-bleed.
Troubleshooting Common Issues
Soft lever feel or inconsistent braking usually indicates trapped air or old fluid. Bleed the system thoroughly using the SRAM Bleeding Edge port.
Rotor rub may result from misaligned calipers or pistons not fully retracting. Re-center the caliper or reset the pistons using plastic tire levers to push them back evenly.
Sticky pistons can often be resolved by removing the pads and lubricating the piston edges with DOT-compatible grease, then cycling them a few times.
Lever stiffness or lag may be due to contaminated fluid or hose kinks. Inspect hoses for sharp bends and replace if damaged.
Customization for Performance Optimization
Riders can tailor the Force eTap AXS D2 HRD for specific applications. Larger 180mm rotors can be installed for increased braking force on gravel or hilly routes. Pad material choice also affects feel—resin pads are quieter and gentler, while sintered pads offer more aggressive bite and durability.
The shifting paddle and lever angle can be swapped between left and right sides if preferred, supporting ambidextrous riders or unique cockpit setups.
Integration with Other AXS Components
This brake set is designed to work seamlessly with all AXS-enabled components, including Force AXS derailleurs, power meters, and blips. The wireless protocol eliminates the need for cables, streamlining setup and reducing weight. Firmware updates can be applied via the AXS app to improve performance or add features.
Battery placement is uniform across components, simplifying spares management. Cross-compatibility with Red and Rival AXS parts allows for modular upgrading.
Comparison with SRAM Rival and Red eTap AXS HRD
While all three models—Force, Rival, and Red—share the same eTap AXS architecture, key differences exist in material and weight. Force D2 HRD uses carbon shift paddles and alloy calipers, offering a middle ground in performance and price. Red uses more carbon and titanium parts for reduced weight, while Rival leans on more cost-effective aluminum and steel components.
Force also has a more refined haptic feel at the lever and an updated visual profile. Functionally, all models share brake fluid type, rotor compatibility, and wireless protocols, but Force is typically the best balance for serious enthusiasts seeking top-tier performance without the Red price tag.
Compatibility with Drivetrain and Frame Standards
The Force eTap AXS D2 HRD is compatible with 12-speed AXS road drivetrains. It requires flat-mount frame standards and can be paired with 140mm or 160mm rotors. Frames must allow for internal hose routing for a clean aesthetic, although external routing is supported on older frames with proper adapters.
The brake levers are fully hydraulic and not backward compatible with mechanical shifting systems. Ensure bottom bracket routing options do not obstruct hose passage or create tight bends.
Conclusion
The SRAM Force eTap AXS D2 HRD brake sets represent a refined integration of hydraulic braking and wireless shifting. Built for reliability, comfort, and adjustability, they are ideal for riders demanding top-tier performance in a sleek package. Whether you’re upgrading or building a new bike, this system offers consistency, customization, and engineering precision that supports long-term riding confidence.