The SRAM Force eTap AXS is a high-performance, wireless electronic shifting system designed for modern road bikes. Known for its seamless integration, customizable gear ratios, and precise shifting, the Force eTap AXS represents the second-tier offering in SRAM’s AXS lineup—below Red and above Rival. Installing, adjusting, and maintaining this system requires technical understanding, proper tools, and a methodical approach to ensure optimal function and long-term reliability.
This guide offers a step-by-step walkthrough for mechanics and enthusiasts focused on the Force eTap AXS system. Whether you’re building a bike from scratch or replacing a component, this comprehensive article covers everything you need to keep your Force eTap AXS drivetrain running smoothly.
Tools Required
- Torque wrench [paid link] with 4mm, 5mm, and T25 bits
- Chain wear gauge
- Cassette lockring tool [paid link]
- Quick link pliers
- Flat and cross-head screwdrivers (for derailleur cage limit checks)
- SRAM AXS Mobile App (for setup and firmware updates)
- Chain tool compatible with 12-speed chains
- Clean rag and isopropyl alcohol
- Bike stand [paid link] for secure mounting
Installing the SRAM Force eTap AXS
Preparing the Frame and Components
Before installing any parts, ensure the frame is clean, the rear derailleur hanger is straight, and the bottom bracket is properly torqued. SRAM Force eTap AXS is fully wireless, so you don’t need to route traditional cables or housing, simplifying initial setup.
Mounting the Front and Rear Derailleurs
Attach the front derailleur to the braze-on mount using the correct torque specification (7-8 Nm). Ensure that the derailleur cage is parallel to the chainrings and sits 1-2 mm above the tallest chainring tooth.
The rear derailleur mounts to the derailleur hanger using a T25 Torx bit. Align it with the cassette to ensure proper movement across the 12-speed range. Torque to 8-10 Nm.
Installing the Crankset and Chain
Insert the DUB [paid link] spindle through the bottom bracket shell and tighten the non-drive side crankarm bolt to 54 Nm. Confirm there’s no play in the crankset after installation.
Use a SRAM 12-speed flat-top chain and measure it accurately using SRAM’s chain sizing method. Use a quick link to secure the chain.
Battery Installation and Pairing
Attach the fully charged eTap AXS batteries to each derailleur. Hold the AXS button on each component to begin pairing. Use the SRAM AXS app to complete the pairing process and customize shift logic (e.g., sequential or compensating modes).
Adjusting the Derailleurs for Precision Shifting
Front Derailleur Adjustment
Use micro-adjustments within the AXS app to fine-tune front derailleur positioning. Check that there is no chain rub in any chainring-cog combination. The high and low limit screws only serve as crash protection on eTap AXS, not for traditional adjustment.
Rear Derailleur Setup
Position the derailleur so the guide pulley aligns precisely with the smallest cog. Use the B-gap adjustment tool (provided by SRAM) to set the correct distance between the upper pulley and the largest cog. The AXS app allows for micro-adjustments in 0.25 mm increments, letting you perfect shifting performance.
Maintenance Tips for Longevity
Routine Firmware Updates
Use the SRAM AXS mobile app regularly to check for firmware updates. Updated firmware ensures optimal performance and bug fixes.
Battery Charging and Care
Each battery offers 60+ hours of ride time. Charge them with the included USB charger and avoid draining them completely to preserve battery health. Always carry a spare battery on long rides.
Chain and Cassette Cleaning
Clean the chain, cassette, and derailleur pulleys using isopropyl alcohol and a soft rag every 100-200 km, especially in wet conditions. Avoid degreasers that may harm pulley bushings or cage coatings.
Troubleshooting Common Set-Up Issues
Chain Drop from Front Chainring
Often caused by improper chain length or incorrect front derailleur height. Recheck spacing above the big ring and re-tension the chain if needed.
Slow or Hesitant Shifts
Check for firmware updates first. Then, perform a micro-adjust via the AXS app. Also, inspect the derailleur hanger alignment and chain wear.
No Response from Shifter
Ensure the coin-cell battery in the shifter isn’t depleted. If a replacement doesn’t help, re-pair the system using the AXS pairing protocol.
Customizing Force eTap AXS for Performance
The Force eTap AXS allows for several customizations via the app:
- Sequential Shifting: Automatically shifts front and rear for optimal cadence.
- Compensating Mode: Adjusts rear gear when you change the front ring to keep cadence consistent.
- Multishift Options: Control how many gears the system shifts when you hold the button.
You can also assign shift functions to different buttons, useful for riders using blips or drop bar remotes.
Comparing Force eTap AXS with Rival and Red
Force eTap AXS offers a balance between weight, price, and performance. It uses carbon and alloy materials for a lighter setup than Rival, but it lacks the ceramic pulleys and full carbon construction of Red. Force also features power meter crank options that are more affordable than Red’s equivalent.
Component Compatibility Considerations
- Cassette and Chain: Must use SRAM XDR [paid link] cassettes and flat-top 12-speed chains.
- Chainrings and Cranksets: Compatible within the Force/Red/Rival ecosystem, but best results come from staying within Force for matched shifting profiles.
- Brake Calipers and Levers: Use with hydraulic SRAM HRD systems; mix-and-match between Force and Red calipers is acceptable but not visually or weight-optimized.
Final Thoughts
The SRAM Force eTap AXS is a high-performance groupset that rewards careful installation, precise adjustment, and regular maintenance. By following the manufacturer’s specifications and leveraging the full range of tools and app-based controls, you can ensure that your drivetrain delivers crisp, reliable shifts in all conditions. Whether you’re racing, training, or enjoying weekend group rides, the Force eTap AXS is engineered to meet the demands of serious cyclists.