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@colm
My specific question is does anyone have any experience with the Sugino MC130 crankset. It doesnt have much info about it online but appears to be an upgraded design of the RD2. Im aware that they are both road doubles, the MC130 also has extra machining done to remove the tabs for inner chainring, just like Speciates TA did with the Alize piste 130bcd. Ive seen very expensive MC130 chainrings too, a copy of 1970/80s style with anodized colors