The Shimano SLX CS M7100 12-speed cassette features Hyperglide+ technology, which ensures high precision and smoothness as well as shifting speed when shifting up and down. Hyperglide+ also minimizes noise. CS-M7100 cassettes feature an aluminium spider and an aluminium sprocket (the largest sprocket), which saves weight and contributes to durability. If you want to enjoy narrow gear jumps, go for the 10-45 version. If you want to cover as wide a range as possible, the 10-51 gradation is the right one for you.