Trek engineered chainstays help transmit the trail to your rear shock while maintaining a stiff frame.
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
