Key features cassette design for high shifting performance with a quieter chaincassette combination semi spidered design light strong efficient 16t cog except for wifli 14t 231g 11 25 gear ratio 11 25 11 12 13 14 15 16 17 19 21 23 25 11 26 11 12 13 14 15 16 17 19 21 23 26 11 28 11 12 13 14 15 16 17 19 22 25 28 wifli 11 32 cassette option 11 32 11 12 13 14 15 17 19 22 25 28 32 semi spidered steel cogsfor more information on how to keep your bike run