Join Date: Jul 2004
Location: Ffld Cnty Connecticut
Bikes: Old Steelies I made, Old Cannondales
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Now-a-days, we usually refer to the number of speeds based on the number of cogs on the rear wheel. Current bikes are anywhere from 8 - 11, while back in the old days there were only 5 on the back. The more cogs in back, the tighter the spacing between the cogs. So you need a chain to match that spacing. 9 cogs, you need a 9 speed chain. 10 cogs, a 10 speed chain. If you have 6 or 7, I think the chains are interchangeable (not sure). Count how many cogs you have.
Bikes: Old steel race bikes, old Cannondale race bikes, less old Cannondale race bike, crappy old mtn bike