Clarks rear cassettes are all manufactured to a high standard, using Nickel plated steel for increased longevity. Can be fitted using a 12 tooth splined cassette removal/fitting tool. Shimano compatible, rear cassette, suitable for road, hybrid and MTB bikes. Compatible with most 10-speed gear systems, providing a versatile range of gearing options (excluding Campagnolo). Gear Ratio - 10 Speed - 11t, 13t, 15t, 17t, 19t, 21t, 24t, 28t, 32t, 36t.