TheSRAM Red22 Rear Derailleur ensures that you are always at the height of your capability with fantastic performance levels that only SRAM could provide. This Rear Derailleur has been designed to provide the most efficient and precise shifting motion to date, with the addition of a hollow titanium anchor bolt and improved tooth geometry of the jockey wheel the Rear Derailleur is the most refined build to date. The result of these improvement on the SRAM Red22 Rear Derailleur is a chain run which is smoother and quieter for a generally more enjoyable riding experience while still pushing performance levels to the max! SRAM Red22 Rear Derailleur Features Exact Actuation™ shifting provides fast, and accurate True 22 shifts More clearance with 28t cassettes thanks to a longer B-knuckle New silent shifting with optimized Aeroglide Pulleys™, ceramic bearings New spring-fixed barrel adjuster New chain pulley cage adds precise chain management Titanium pinch bolt keeps a low profile while minimizing weight