The SRAM Eagle S500 AXS B1 Rear Derailleur is a 12-speed wireless electronic derailleur built for mountain bikes, compatible with 10-52T and 10-50T Eagle cassettes. AXS connectivity handles wireless setup and shift customization, and the derailleur pairs with any other AXS component on the bike.
An Overload Clutch disengages the motor gearbox on impact and returns the derailleur to position afterward, reducing damage risk from rock strikes or crashes. The unit is water and dust resistant, and mounts using a standard derailleur hanger with a 42T total capacity.
Quick Facts
| Feature |
Specification |
| Compatibility |
10-52T and 10-50T Eagle cassettes, MTB |
| Speed |
12 |
| Capacity |
42T |
| Mount |
Standard |