Unique splined carrier fixed gear cog system makes removing and installing cogs easier

FEATURES:
+ Uses Parktool BBT-9 or Shimano TL-FC32 (two-piece bottom bracket cup tool) for both carrier and lockring
+ Compatible with all English/ISO standard threaded track hubs
+ Includes 16T, 17T, 18T hard anodized aluminum cogs
+ Splined carrier is BC1.37 x 24TPI
+ Lockring is BC1.29 x 24TPI
+ Sold as complete set only

The Sinz Cog Pack includes a full run of steel cog sizes in 12- through 18-tooth.

An ultra lightweight alloy cog for the younger crowd is now available by SINZ.