I'm thinking of selling a specialized 144mm forged crankset i have to a friend cross country who'd be using it for a fixie. with its original 107mm length single, I measure/calculate that the chain line will be 42mm if he puts a 1/8" (3mm thick) chainring on the inner side, and I gather thats standard for a track bike setup.

does anyone make any nice little streamlined spacer/washer/fittings for the outer side instead of just running short chainring bolts? seems like a lot of double -> fixie crank conversions work best on the inside space... an aluminum bit that was countersunk for a double chainring bolt and shaped approximately like a thimble in profile, and 3mm thick, would be sweet for this presumably common application. round off the outer edge of the curve....

I could try and draw a sketch of what I'm picturing, but I suck at art.

or would the 'cool' mod be to take my old 52T chainring and grind off the teeth so its a chainguard with his 46 or 48T mounted in the inner position?


said crankset with 52:42T rings