Originally Posted by
DannoXYZ
You don't need to replace the big-ring really, just leave that. Measure the inner ring and see what BCD is, then get the smallest ring that'll fit that crank.
The smaller ring is a 110mm by my measurement unless it's some weirdo proprietary Sugino size and I'm off by some fraction of a mm. It looks like the smallest 110 ring I can get is a 34T. Is it mechanically feasible to shift from a 52T big ring to a 34T small ring? 18 teeth?
I'm still hoping someone can answer my question regarding the BCD of the 52T large ring. I'd really like to reduce this to a 48 or 46 tooth.