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Old 09-10-12, 09:02 PM   #1
rjon57
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Replace 9 sp freewheel to 10 speed?

I ride a 2002 Lemond Zurich with an Ultegra 53/39, 175mm Crank Arms, and a 12-25 freewheel. The rear wheel is a Bontrager Racelite. The RD is an Ultegra GS. I am 53 and and although I try to ride and train as much as possible the hills in NJ/PA seem to be getting steeper. I would like to increase my high gear to a 28 but all the 9 sp cassettes I see only go to 27. Can I put a 10 sp cassette with a 28 on the bike without much problem given my RD? Also, what would be the smallest chain ring I could use to replace the 39?

Thanks.
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Old 09-10-12, 09:06 PM   #2
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Not a simple change. Forgetting whether you need a longer chain which is manageable, consider that 10s spacing is different than 9s spacing, so you'd need to replace the right shifter and that's not cheap. A 28t only gets you a bit less than 4% lower than you could get with a 27t, so it's hard to justify a major overhaul.
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Old 09-10-12, 09:10 PM   #3
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Shimano has a non-Ultegra 11-28T 9-speed cassette. But like Frank said, the trivial difference won't be worth it. Just get stronger.
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