I decided to stick with the stock ultegra 9sp crankset (~2003) and replace the worn 52T and 42T but there are lots of chainrings to choose from. Original chainrings say "shimano SG A-52" and "A-42". Am I looking for shimano 6500 or 6600, specific part numbers?
Could I go to 53t (or 54T) and 39T? Would I want to? I already went from 30T to 28T, and that was good.
We're running 11/23 (sometimes 11/26) cassettes and spin out with the 52/11 descending long medium grade passes.
I know this is out there but a quick search didn't help, individual cases and all.