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Reading Shimano Compatibility Tables

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Old 01-13-21, 10:36 AM
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Reading Shimano Compatibility Tables

When reading Shimano compatibility tables and it reads that FC-6603 is compatible with FC-6703, does this mean that 6703 chain rings can be installed on a 6603 crank?

As you can likely deduce, I have a FC-6603 triple and the middle and inner rings are starting to wear. New 6603 rings are not showing up on any searches and I'd like to not replace the whole crankset.

Thanks.
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Old 01-14-21, 06:29 PM
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Do your search using 6600 not 6603. My 6603 is 52/39/30 and the chainrings are 130/74mm BCD

https://www.jensonusa.com/Shimano-Ul...8aAvGcEALw_wcB

Shimano Ultegra 6600/6603 10sp Chainring - $18.95 - Bike Parts 360
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Old 01-14-21, 06:38 PM
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Or you can search by Shimano part number found here.

https://si.shimano.com/api/publish/s...6603-2366E.pdf
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