Need replacement chainring for Shimano Ultegra FC-6503 42t chainring The Shimano Ultegra FC-6503 42t chainring is &quot;obsolete&quot; but there must be some 42t 130 bcd chainring that would work. It is the middle of a triple. The mounting bolts pass thru the 52t to a spider hole, then into the 42t ring. the 42t ring is flat, except for some ramps. It would seem a similar 42t ring would work, even if it does not have ramps. Nobody know what would replace it. A Shimano Dura-Ace FC-7800 42 Tooth 10-Speed A-Type Chainring might work. Does anybody know? Thanks in advance!
I did some looking around and was surprised by the lack of options for a proper ramped and pinned 42t 130 middle. But, there's still TA, the Alize model in this case. Don't get a non-rampy chainring to use with STI. It's too much of a compromise. FSA has one too.