SRAM X01 Rear Derailleur - 11-Speed Medium Cage Black CheckoutSpec= 42.2g and Racktime series rack bases

and Racktime series rack bases

5mm Drivetrain Spacing Fat Bike Speed 11/12

For front or rear use

available at a split seconds calling courtesy of the 4 degree hub engagement

model CSMX3 freehub type HG speed 10 range 11-42 cogs 11

SRAM X01 Rear Derailleur - 11-Speed Medium Cage Black CheckoutSpec= 42.2g and Racktime series rack basesSRAM X01 Rear Derailleur 11 Speed Medium Cage Black. Competition grade derailleur built with carbon fiber and aluminum featuring roller clutch pulley cage and cage lock feature for easy wheel installation. X Horizon design is specific to single chainring drive trains. Wide tooth narrow tooth pulley wheel maximizes chain control by fitting inner and outer chain links perfectly X Horizon design maintains constant chain gap across all gears and