SRAM Red eTap Rear Derailleur Medium Inner Cage with Screws Battery Size-N/A there are some road bike

there are some road bike fork/frames that require a special thinner lock ring

Rings 46/33Number of Chainrings DoubleDrivetrain Speeds 12Chainring BCD Direct Mount SRAM 8-BoltChainline/Hub Compatibility 135/142 Road Disc Hubs < 415 mm ChainstayChainline/Hub Compatibility 135/142 Road Disc Hubs > 415 mm ChainstayColor CarbonCrank Length (mm) 165Crank Intended Use RoadBB Included NoPedal Spindle 9/16"Spindle Interface Type SRAM DUBDefined Color Carbon

one channel

Secure roll-top keeps them up and in place

A high focus on comfort with Light Gel Plus padding differentiates it from the SLR Boost allowing cyclists to enjoy improved comfort and perfect positioning on the saddle

SRAM Red eTap Rear Derailleur Medium Inner Cage with Screws Battery Size-N/A there are some road bikeSRAM Red eTap Rear Derailleur Medium Inner Cage with Screws. SRAM rear derailleur cage assembly parts for rebuilding SRAM rear derailleurs.