XG-1275 Eagle 12-Speed Cassette 10 – 50T maybe 150km on it before changing to a different setup. No bent or missing teeth, Cleaned and ready to go! FULL PIN technology uses lightweight, stamped steel cogs held together with high-strength stainless steel pins. The result: a cassette that’s light and strong. The open design similar to SRAM's X-DOME cassette aids in mud clearance, giving you cleaner shifting performance and longer component life. X-GLIDE2 improves both inboard and outboard shifting, as well as chain retention.