Shimano 105 Cassette 12s CS-HG710 (11-36T)Wide range cassette for varied terrain drop bar riding The 11 36T 12 speed cassette offers a wide gear range of 327%. From sprinting on the flats to steep climbs, you can choose the best gear ratio to suit every situation. Gear steps are optimized for pedaling efficiency, with the first eight cogs focusing on a natural and comfortable connection, and the largest four cogs allowing you to select from a wide range of gears while avoiding abrupt gear