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New Shimano 10speed with 'old' 9 speed RD?

bigpiklebigpikle Posts: 1,690
edited December 2010 in Workshop
I'd like to upgrade my old 9 spd Ultegra set up to a 10 speed to match my other bikes and make it easier to share wheels etc. I've found some well priced STI levers in recent Ultegra or 105 but am wondering if I can simply use the current RD?

From what I have read the 10 speed and 9 speed cassette are the same external dimensions so it should work fine when its all set up correctly, but just wanted to check with the experts here before I go for it?

I'm hoping all I need are the shifters, 10 speed chain & cassette and new cables - is this correct?

Thanks
Your Past is Not Your Potential...

Posts

  • John.TJohn.T Posts: 3,698
    Yes you can. The only items you must change are shifters, chain and cassette. Everything else will work fine.
  • bigpiklebigpikle Posts: 1,690
    thanks John - ordered it all up and have the 10 spd cassette already. Finally means an easy solution to running a Powertap wheel on 3 bikes with different GS om each one :roll:
    Your Past is Not Your Potential...
  • John.T wrote:
    Yes you can. The only items you must change are shifters, chain and cassette. Everything else will work fine.

    Absolutely.
    Infinite diversity, infinte variations
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