Surly Track Cog Option:19t - 3/32" Complete press-fit bottom bracket assembly

Complete press-fit bottom bracket assembly for Shimano HollowTech II MTB cranks

or muddy the trail

DT Swiss Centerlock to 6-Bolt Adapter - Road

Can also use 52T Outer Chainring from FC-7900 or FC-5700

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Surly Track Cog Option:19t - 3/32" Complete press-fit bottom bracket assemblySURLY TRACK COG Surly California Proposition 65 https: cambriabike. com pages warning california proposition 65 The Surly Track Cog is built for fixed gear applications, offering durability, reliability, and compatibility with a wide range of track hubs. Machined from SCM415 Chromoly steel and heat treated for extra strength, it ensures long lasting performance for both street and velodrome riding. The 7. 4mm thread base provides maximum engagement