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http://www.bikecalc.com/gear_inches
52x18 is 76.5inch
You probably want a 15-17t cog giving somewhere between 90-80inch. These all assume a 25mm tyre. A 20mm tyre will give slightly less inches (not by much)
Turkish
Hoping I can remember to check back on this thread, tag me if you have a good answer for me!
Its the middle of winter and I'm just toying around with my bikes at the local "recycled cycles" swap shop. Im working on a pursuit bike currently. I would like to know what a good gear ratio for track riding/racing would be? Currently riding 52X18… I haven't learned how to calculate my gear inches yet… : (