SRAM REAR RED MID 11s C2 WiFli 32T MAXExact Actuation shifting provides fast and accurate shifts More clearance with 28t cassettes thanks to a longer B knuckle Silent shifting with optimized AeroGlide pulleys and ceramic bearings Chain pulley cage adds precise chain management Titanium pinch bolt keeps a low profile while minimizing weight Carbon cages, carbon inner links, and titanium hardware Spring fixed barrel adjuster