Miche cassettes are engineered in Italy to give you complete compatibility with your relevant choice of components. Ramping and shift positions are largely kept the same as the original manufacturer but Miche give you alternative ratios, great performance, precision machining and keen pricing.Primato 9x Shimano cassette* Shimano 9 speed compatible * Special heat treated steel sprockets, chrome-plated* Special heat treated steel lock ring, chrome-plated* Resin spacers* 250g (12-21)**Gear Increments*** MCX36: 13/14/15/16/17/19/21/23/26* MCX37: 13/14/15/16/17/19/22/25/28* MCX38: 13/14/15/16/17/19/21/23/26