Thread: Which track sprockets (cogs) have ISO, and which have english threading?
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Old 01-28-07 | 09:26 AM
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HillRider
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Joined: Aug 2005
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From: Pittsburgh, PA

Bikes: '96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '20 Surly Midnight Special, All are 3x10. It is hilly around here!

Sheldon Brown is the authority on fixed gear and similar bikes so he is the likely candidate to have this info.

I BELIEVE that ISO (aka Italian) threading has a 55° thread angle while English is 60° but the diameter and thread pitch are otherwise identical.
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