Tired of grinding out the steeps on your 1X setup? Grind no more with Hope's 40t-Rex (40t ratio expander). It allows you to upgrade your existing 11-36 10spd cassette to give an 11-40t range. The T-REX ring installs behind existing cassette, replacing one of the smaller sprockets, usually 17t.
- SRAM/Shimano specific tooth profiles and shifting
- Weight: 74g