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Old 04-24-15 | 02:37 PM
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rbkelso
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Joined: Apr 2015
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Bikes: 2002 Bianchi Vigorelli

Shimano Ultegra Front Chainwheel Upgrade

I need to replace the 52T and 42T chainrings on a Shimano FC-6503 on a 2002 Bianchi Vigorelli, but can't find a 42T online. Is there a substitute? And if not, can I upgrade to a Shimano FC-6703 with a CS-6700 cassette?
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