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.The latest incarnation of the ever popular Miche Primato cassette, suitable for Campagnolo 12x. The last 2 sprocket positions and lock ring are made of AL7075-T6 Aluminium, giving reduced weight with greater strength. All middle sprockets are matt finish chromed steel.* Steel first sprocket with matt finish chromed steel middle sprockets* Anodized last 2 sprockets made of AL 7075-T6* AL 7075-T6 Black anodized lock ring* 390g (14/29)**Gear Increments*** MCX230: 14/15/16/17/18/19/20/21/23/25/27/29* MCX231: 16/17/18/19/20/21/22/23/24/25/27/29