SRAM Red eTap Rear Derailleur B-Bolt and B-Screw ModelNumber=E4680 two-axis system provides maximum lateral

two-axis system provides maximum lateral transmission and control at every stride

An ergonomic lever on the side of the clamp opens and closes the clamp

If using a 9-speed drivetrain use a 10-speed chain (shifts and works well on a 9-speed drivetrain and fits the ring tighter for better chain retention)

impact-absorbing SmartFlex™ pads layered on top of a ventilated

Color Black Number of Chainrings No Rings Included Crank Length (mm) 170 Crank Intended Use Mountain Weight 418 BB Included No Pedal Spindle 9/16" Spindle Interface Type RaceFace/Easton CINCH Chainring BCD Direct Mount CINCH Chainline/Hub Compatibility 135/142 MTB Hubs Chainline/Hub Compatibility 141/148 Boost Hubs Chainline/Hub Compatibility 150/157 DH Hubs Defined Color Black keyword search RF136

SRAM Red eTap Rear Derailleur B-Bolt and B-Screw ModelNumber=E4680 two-axis system provides maximum lateralSRAM Red eTap Rear Derailleur B Bolt and B Screw. Upper Bolt and Spring kits for SRAM rear derailleur maintenance and repairs.