Shimano FC 7800 39 tb type Chainring. Accept no substitutes...is your 39t ring spent or bent Grab Shimano's official OE replacement Dura Ace 7800 39T inner ring. Ideal for Dura ace, but will work amazingly with any 130mm bolt crankset with an 8, 9 or 10 speed drivetrain. Cut from straight block aluminum alloy, then polished to that high luster you expect from Dura Ace.
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