The sram x1 xg 1180 11 speed cassette is a highly durable 10 42 gear range mtb cassette that is ready for absolutely any riding style with the three smaller cogs being made form a single block of billet steel and the other eight cogs individually pinned together the sram xg 1180 mini cluster can handle even the most abusive of riders x glide technology guarantees that every single shift is perfect guaranteeing that you never compromise on speed or power while out on tough terrain sram x