SRAM Eagle S500 AXS B1 12 Speed Rear Derailleur

The SRAM Eagle S500 AXS B1 12-speed rear derailleur delivers the performance and reliability of SRAM’s wireless AXS ecosystem at a more accessible price point. Designed for riders who want the simplicity and precision of electronic shifting, the S500 AXS provides fast, consistent shifts without cables or housing to maintain.

Built around the proven Eagle drivetrain platform, the S500 AXS derailleur is compatible with Eagle 12-speed 10-50T and 10-52T cassettes, making it a versatile upgrade for modern mountain bikes. The derailleur uses SRAM’s Type 3 cage damper for improved chain retention and quieter descending, while the robust aluminum cage is designed to handle demanding trail conditions.

The integrated Overload Clutch helps protect the derailleur from impacts by allowing the motor gearbox to disengage during a hit and automatically return to position. This added protection is especially valuable for riders tackling rocky terrain, bike parks, and aggressive trail systems.

Why We Like It

At Fanatyk Co, we like the SRAM Eagle S500 AXS because it brings wireless shifting performance to more riders without sacrificing the reliability that Eagle drivetrains are known for.

For many riders, AXS is a game changer. Setup is simple, shifting is consistently precise, and there are no cables to stretch, contaminate, or replace. The result is a drivetrain that stays dialed with minimal maintenance.

The S500 AXS is a great option for riders upgrading from mechanical Eagle drivetrains or replacing a worn derailleur on a modern MTB. It offers the performance benefits of electronic shifting while keeping the price more approachable than higher-end AXS models.

For Whistler and aggressive BC riding, we appreciate the added durability of the Overload Clutch system. Rocks, crashes, and trail impacts happen — having a derailleur designed to protect itself is a major advantage.

Key Features

• SRAM Eagle AXS wireless electronic shifting
• 12-speed Eagle drivetrain compatibility
• Compatible with 10-50T and 10-52T Eagle cassettes
• Robust aluminum cage construction
• Type 3 cage damper for improved chain retention
• Overload Clutch impact protection
• Water and dust-resistant AXS electronics
• Wireless setup and customization through SRAM AXS ecosystem
• 1x drivetrain compatible
• Long cage design for wide-range MTB gearing

Best For

✅ Riders upgrading to wireless MTB shifting
✅ Trail and enduro bikes
✅ All-mountain riders
✅ Riders who want less drivetrain maintenance
✅ Eagle 12-speed drivetrain upgrades

Not ideal for:
❌ Riders running SRAM Transmission T-Type drivetrains
❌ Riders looking for the lightest possible race setup