Shimano Track Cog
You've got to have the right ratio for the track, and Shimano's Dura-Ace cogs come in a range of tooth counts so you can always be prepared. Manufactured from durable chromoly steel, each cog is machined to run perfectly straight.
1.37" x 24 tpi
|Silver / 15T / 3/32-inch||689228170124||Y27915000|
|Silver / 16T / 3/32-inch||689228170148||Y27916000||4555|