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Replacing Shimano chainrings - help please

Jul 17, 2009
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I have an old Dura Ace chainset (maybe 15+ years old) with worn chainrings. I want to replace them to put together a winter bike - yes, I know it's August!

The inside diameter of the rings is 110mm, I have seen 110mm Stronglight rings said to fit Shimano 9/10 speeds on a website but they seem to be for a compact chainset, will they fit? If not, what replacements should I buy? If possible I would rather get cheaper copies than Shimano.
 
jpowell said:
I have an old Dura Ace chainset (maybe 15+ years old) with worn chainrings. I want to replace them to put together a winter bike - yes, I know it's August!

The inside diameter of the rings is 110mm, I have seen 110mm Stronglight rings said to fit Shimano 9/10 speeds on a website but they seem to be for a compact chainset, will they fit? If not, what replacements should I buy? If possible I would rather get cheaper copies than Shimano.

"Dura Ace" was never 110mm BCD(Bolt Chainring Diameter). I'm guessing it's 130mm, as DA has been this from the 80s.

BUT if it is 110mm BCD, any 110mm BCD chainring, like the stronglight or TA ones, will work fine.

Use this to measure.

http://www.sheldonbrown.com/gloss_bo-z.html#bcd
 
Jul 17, 2009
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Thanks Busted Knuckle, Lord of the Rings

Thanks for the info, I didn't know the diameter was measured to the centre of the chainring bolts and not the interior of the ring. You are right it is actually 130mm.
 

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