Get back on the trail with a genuine replacement chainstay.
Trek engineered chainstays help transmit the trail to your rear shock while maintaining a stiff frame.
Key Features
- Redesigned for 2021 Rail 9.5 to fit carbon mainframes
- Backwards compatible to 2020-2021 Rail aluminum mainframes
- Compatible with Rail carbon mainframes
- Color-matched for direct compatibility
- Refer to the Service Manual for assembly & service instructions
- Not compatible with Bosch Smart System speed sensor wire
Part Numbers: 5277961, 5277963, 5277965, 5277967, 5277969, 5284634, 5284636, 5284638, 5284640, 5284642, 5307602, 5307603, 5307604, 5307605, 5322646
