SRAM, Red eTAP, Rear derailleur, 11sp., Short, Black* Updated derailleur design optimizes chain gap for more consistent shifting across the range of gears* SRAM eTap shift logic* Wireless connection via AIREA network for fast and clean installation* Designed to work with SRAM PowerGlide and PowerdomeX cassettes Brand: SRAM Description: SRAM, Red eTAP, Rear derailleur, 11sp., Short, Black Model: Red eTap Length: 8 Width: 7. 9 Height: 3. 7 Weight lb: 1. 5 ID.: 260207 02 Barcode: 710845799112