The SRAM Force eTap AXS D2 HRD [paid link] brake set is a high-performance, wireless hydraulic braking system designed to meet the demands of modern gravel riding. With enhanced modulation, increased lever adjustability, and improved integration with AXS drivetrains, this component stands out as a cornerstone for riders seeking precision and control over mixed terrain.
Tools Required:
- 4mm and 5mm hex wrenches
- Torque wrench (2-8 Nm range)
- Bleed kit compatible with SRAM HRD systems
- DOT 4 or DOT 5.1 brake fluid
- Clean rag and isopropyl alcohol
- Rotor truing tool (if necessary)
- Hose cutter and compression fitting tool
- T10 and T25 Torx keys
- Cassette lockring tool and chain whip (for rotor removal)
Installation of the Force eTap AXS D2 HRD Brake Set
Installing the Force eTap AXS D2 HRD brake set begins with proper placement and securing of the levers, calipers, and hydraulic lines. Mount the levers using a 4mm hex to the drop bars, ensuring ergonomic positioning suited for gravel riding posture. Align brake calipers with the rotor by loosely installing them with a 5mm hex, squeezing the brake lever to center the caliper, then torquing to specification.
Hose cutting should be precise to avoid excess slack, which can interfere with frame routing. Always install a new olive and barb when shortening the hose. Attach and tighten compression fittings according to SRAM’s torque guidelines to prevent leaks.
Rotors should be affixed to hubs using T25 Torx bolts or a lockring system, depending on the rotor interface. Check for rotor trueness before continuing.
Brake Lever Adjustment and Personalization
The D2 HRD levers offer a wide range of adjustability to suit different hand sizes and riding preferences. Reach adjust, accessed via a 2.5mm hex, allows riders to modify how far the lever sits from the handlebar. Pad contact adjust, managed with a small dial behind the lever blade, fine-tunes the bite point for modulation control.
Gravel riders benefit from customizing both features to reduce fatigue on long descents or during frequent braking over technical sections.
Hydraulic System Bleeding and Maintenance
Routine bleeding of the Force eTap AXS D2 HRD system is critical for consistent braking power. SRAM recommends bleeding every 6-12 months depending on riding conditions. Use the SRAM Pro Bleed Kit, ensuring you purge all air from the master cylinder and caliper. Clean fluid reservoirs, wipe down caliper areas with isopropyl alcohol, and inspect for any signs of fluid seepage or contamination.
Brake pad wear should be inspected frequently, especially in muddy or sandy conditions. Replace pads when the compound is less than 1mm thick. Use organic pads for quieter braking and metallic for durability in wet terrain.
Common Troubleshooting Issues and Fixes
One common issue is rotor rub due to caliper misalignment or rotor warping. Center the caliper using the squeeze-and-tighten method or re-true the rotor using a truing fork.
If the lever feels spongy or fails to return properly, air may be trapped in the hydraulic system. A full bleed is usually necessary to restore function.
Intermittent braking power often results from contaminated pads or rotors. Clean the rotor with isopropyl alcohol and replace pads if contaminated with oil or DOT fluid.
Performance Optimization for Gravel Riding
To maximize braking performance on gravel, pair the Force eTap AXS D2 HRD set with SRAM’s HS2 rotors for improved heat management. Additionally, consider running 160mm rotors front and rear for increased stopping power during long descents.
Lever feel can be optimized by adjusting pad contact and reach in combination with different bar widths and hood angles. This ensures better control over varied terrain and in fluctuating weather conditions.
Compatibility With AXS Ecosystem and Drivetrain Components
The Force eTap AXS D2 HRD brake levers are natively compatible with the full AXS ecosystem. They seamlessly pair with 12-speed Force and Red AXS derailleurs via SRAM’s wireless protocol, enabling customizable shifting setups through the AXS app.
For gravel-specific gearing, these levers work particularly well with SRAM’s wide-range 10-36T cassettes and XPLR rear derailleurs. Riders can integrate dropper post controls into the left lever paddle when used with Reverb AXS.
Comparing Force eTap AXS D2 HRD to Rival and Red
Compared to the Rival eTap AXS HRD [paid link], the Force D2 HRD features a more refined lever feel, tool-free pad contact adjustment, and carbon lever blades for weight savings. It delivers a premium experience with moderate pricing.
Against the Red eTap AXS HRD [paid link], Force D2 HRD shares most of the core technology but at a slightly higher weight. Red’s levers use more carbon and titanium hardware but do not significantly outperform Force D2 HRD in braking power or modulation.
For gravel riders, Force D2 HRD strikes a perfect balance between high-end performance and durability.
Long-Term Durability and Environmental Resistance
Designed with rugged terrain in mind, the D2 HRD system features robust sealing at all junctions and corrosion-resistant hardware. It holds up well against mud, rain, and grit [paid link]. Riders should, however, regularly inspect hose connections and caliper seals, especially after riding through creek crossings or sandy washes.
Customization and Ergonomic Enhancements
Handlebar shape, bar tape thickness, and hood rotation all affect the Force D2 HRD’s comfort and braking efficiency. Gravel-specific bars with flare and shallower drops pair well with these levers. Riders can also install lever hood covers with additional texture for enhanced grip during wet rides.
Real-World Feedback and Community Insights
Gravel cyclists who have upgraded to the Force D2 HRD system consistently report enhanced modulation and less fatigue on long rides. The lever feel, particularly during extended descents, is often cited as superior to cable-actuated alternatives.
Many appreciate the integration with AXS systems, allowing on-the-fly adjustments and component monitoring through the mobile app.
Cost vs. Performance Value
While priced above mechanical disc brakes and SRAM Rival components, the Force D2 HRD system delivers a high return on investment for serious gravel riders. It offers significant performance gains, reduced maintenance intervals, and improved bike control, making it a justifiable upgrade.
Future-Proofing With Firmware and AXS Integration
Regular firmware updates through the AXS app ensure the Force D2 HRD system remains up-to-date. These updates can improve responsiveness, compatibility, and user interface over time, providing a level of future-proofing mechanical systems can’t match.
Maintenance Scheduling for Optimal Longevity
To ensure continued performance:
- Inspect brake pads every 300–500 miles depending on terrain.
- Clean rotors and levers monthly or after wet rides.
- Bleed brakes biannually or after any noticeable lever feel changes.
- Update AXS firmware quarterly.
Conclusion
The SRAM Force eTap AXS D2 HRD brake set is engineered specifically for the demands of gravel riding. With superior braking control, excellent integration, and high durability, it stands as an essential component for riders navigating variable terrain. For cyclists who prioritize reliability, customization, and performance, the Force D2 HRD is a top-tier choice for their gravel bike setup.