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 / 13T / 3/32-inch||689228170087||Y27913000|
|Silver / 14T / 3/32-inch||689228170100||Y27914000||210000011730|
|Silver / 15T / 3/32-inch||689228170124||Y27915000||210000007722|
|Silver / 16T / 1/8-inch||689228170155||Y27916100||210000007720|