
In my mailbox today: 16tooth and 17tooth cogs by Chris King. 16t is metal, 17t is alu. The metal cog is smaller, heavier and more expensive. Go figure.

In my mailbox today: 16tooth and 17tooth cogs by Chris King. 16t is metal, 17t is alu. The metal cog is smaller, heavier and more expensive. Go figure.
