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9 speed ring compatabiltiy(1 post)

9 speed ring compatabiltiydan ida
Mar 6, 2002 5:01 PM
Will new 9 speed Shimano 53 39 rings fit on an older Ultegra 600 crank set? I'm asking about the bolt circle and any difference in the spacing between the two gears (I can't imagine that such spacing could be a problem).