Enjoying the Ride Since 1989

The Cog wrench will work on any cassette that has an 11 tooth or 12 tooth cog for the high gear. These are the most common sizes but some cassettes use a 13 tooth high gear and more recently a few 10 tooth high gear cassettes have been introduced. The Cog Wrench will not work for these cassettes. Please check out the Vise Whip for these cassettes.

Posted in: Pedros Cog Wrench, Tools FAQs