- Add much needed range to your existing 1x 10 speed drivetrain
- Shifts stay crisp thanks to e*thirteen speed shift technology and the EXA+ anodized aluminum resists flex under heavy power.
- 40t is compatible with 34t max cassettes
- 40t extended range cog not recommended for use with a 36t max cassette. Shift performance will be compromised as the timing will not be correct.
- 42t is compatible with 36t max cassettes
- 42t extended range cog will not work with 34t max cassettes. 6t jump is the maximum that works well
- Choose Shimano or Sram shift timing based on your cassette
- Weight: 70g (40t); 77g (42t)
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