Bicycle Mechanics - Dura Ace 8sp - are 9sp chainrings OK?

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soma5
05-03-08, 10:19 AM
It seems, from reading Sheldon Brown's website, that there are no issues in using 9sp chainrings on an 8sp Dura Ace crankset, as long as I stay with 8 speeds and use an 8sp chain. Does anyone have any information to the contrary? My 8sp rings are getting a little "sharky" and I want to replace them.

Thank you.

-soma5

Al1943
05-03-08, 10:27 AM
Should work fine.

Al
HillRider
05-03-08, 10:46 AM
The 9-speed small chainring is off-set slightly to the outside to narrow the gap between it and the big ring so a narrower 9-speed chain can't "skate" over the small ring on a downshift. Your 8-speed chain may rub on the outer ring when in the middle ring and some of the smaller cogs.

the beef
05-03-08, 11:04 AM
It should be okay. Your chain is likely worn though, and may not mesh very well with a brand new ring. This might be a good time for a new chain.