Hope T-Rex Cog Sram 40T

T-Rex expands your 10-speed cassettes usable range for extra low gearing. Made in the UK and features specific shift points for factory-level shifting. Precise matching of the tooth profiles and shifting points specific to each cassette. Hard anodized 7075 T6 Aluminum. Allows you to upgrade your existing 11-36 10spd cassette to give an 11-40T range. Perfect mating of supporting tabs to reduce flex and aiding shift performance. T-Rex installs behind your existing cassette and replaces one of the smaller sprockets, usually the 17T. Lower B-tension adjustment is needed ensuring good shifting throughout the cassette range compared to fitting a 42. Compatible with Sram PG10360, PG1050 and PG1070 11-36 cassettes. Cassette Body Type: Shimano/SRAM 8, 9, 10 Speed. Defined Color: Silver. Intended Cassette Compatibility: Shimano. Drivetrain Speeds: 10. Tooth Count: 40.