Can I use Dura Ace 10 chainrings on a Dura Ace 9 crankset?
Yes. The BCD (bolt spacing pattern) is the same on 9 and 10 speed Shimano. The posts that the bolts go through and stick down from the chainrings to the crankset are a little wider on 10 speed vs. 9 but as long as the appearance doesn’t bother you it will work fine.
I can’t picture what ya’ mean. I not is smart!
Look at the bike from the drivetrain side. The tab that you stick the bolt through, to attach the chainring to the crank, is slightly wider on the 10 speed rings vs. the 9 speed ones. So where the 5 bolts go through a 10 speed chainring won’t have a perfect curve from the chainring to the crankset.
Regardless, the chainrings will fit and work.
I am currently running this set-up. It works fine, no issues at all except the not matching thing already mentioned.
David
possibly any pictures?
No pics to show that part of my bike specifically. But, it looks fine…no one will ever notice…not that it looks bad though. I did it for whenever I upgrade my crankarms, i’ll already have rings to use. I bought a few different sizes to. I’m running full DA 10spd. The cranks are the only part that is still the 9spd version.
Here you go. These are from my road bike that hasn’t been reassembled yet.
