How do I figure out which size chain my fixed gear bike has My fixed gear bike is going to want a new chain soon, how do I figure out which width I should use?
There two sizes of chains that can be used on a fixed wheel bicycle 1/8" and 3/32".  It all depends on the width of the teeth on the cog and the chain ring.  The most common one is 1/8" as that is what is used on the track and BMX.  On bikes that have been converted from gears to fix are more likely to be 3/32".  My Son's bike has a 3/32" cog, chain ring and chain.