Q.
asked by: a guest
Is the threading on these cogs 1.370 x 24 (British) or 1.375 x 24 (ISO)? I have seen cogs from other manufacturers that claim to be 1.375 but have the same markings (BC1.37x24tpi) on the cog.
A.
anwered by: canteau
The Halo Cogs are 1.37x24tpi, Shimano cogs are the most common 1.375 cogs. Surly has a good write up on crossing between British and ISO cogs here:
https://surlybikes.com/uploads/downloads/Track_Cog_Dingle_Cog_Lockring_Instructions.pdf
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