OP the thing to look for is a thing called BCD =
http://www.sheldonbrown.com/gloss_bo-z.html. The magic number is 144 for omniums; any chainring with a BCD of that will fit although I've heard with earlier omniums the stock bolts are shorter than standard and might have to be replaced when using an alternate ring.
Originally Posted by
TejanoTrackie
Installing a Shimano DA chainring on a SRAM Omnium crankarm is a crime against humanity.
Does an omnium chainring on a 7710 crank make it all better by canceling it out?
