Fit with SRAM RED ETAP only. Won't fit Regular Sram Red Mechanic Derailleur. Fit with 32t Cassette Cog max, it will be a good choice for 1 11 Road bike / CycloCross Setup. The item "J&L Ceramic&Carbon Oversized Derailleur Pulley Wheel (OSPW) for Sram Red Etap" is in sale since Thursday, February 14, 2019.This item is in the category "Sporting Goods\Cycling\Bicycle Components & Parts\Rear Derailleurs". The seller is "pingthyy2010" and is located in HangZhou. This item can be shipped worldwide.