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.
'''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!
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.