Microshift G-Series 11 Speed Cassette 11-46 G-Series cassettes feature steel cogs mated with an aluminum spider, a feature which saves weight and lessens wear on the hub’s cassette body. If weight is an issue for you, the G-Series is a no-brainer. Compatible with standard Shimano & Sram HG cassette hub bodies Continuosly molded cogs achieve a high standard of durability and straightness Spider carrier reduces wear on aluminum cassette hub bodies Combination 11-13-15-18-21-24-28-32-36-40*-46*