Fits Rocky Mountain frames:

• Rocky Mountain all 27.5-er and 29-er MTB E-Bike 2020-2021 

Left-hand M16 thread locknut included

Different design compared to the OEM one:

re-engineered especially in order to work properly with Shimano 12 speed derailleur. Changes applied after a lot of complaints from riders, after long investigation, 8 prototypes, and more than one month of tests on 2 different bikes we have corrected the location and position of the derailleur according to Sram's and Shimano's specifications.