About this item ?Cog Size of 12 Speed Cassette for Road Bike: 11-28T/11-32T/11-34T ?Compatibility: Compatible with HG(HYPERGLIDE) freehub body only, not compatible with XD/XDR freehub body, please confirm before purchasing. ?Durable and ultra-light: Made of chromium molybdenum steel and aviation-grade aluminum alloy. The rainbow series is coated with electroplating technology, which makes the surface bright and beautiful. ?Weight is everything: CNC hollowed out ultra-light design, provides the ultimate cycling experience for you who love cycling. [11 speed 11-28t Silver] 7.6oz (217g), [11 speed 11-32t Silver] 8.0oz (226g), [11 speed 11-34t Silver] 8.4oz (239g), [11 speed 11-36t Silver] 8.6oz (246g). ?Perfect packaging and customer service: The original gift box packaging, and this is the perfect gift for yourself and your friends. You can click to view the product video - real shot unboxing. Perfect service, no matter before or after purchase, if you have any questions, please feel free to contact us, we will answer for you as soon as possible. › See more product details