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9 speed to 10 speed?
#1
Hi,

I've just bought a 10 speed shimano cassette and a 10 speed SRAM chain for my road bike when I currently have a 9 speed. Is it possible to adjust the rear derailler and shifters to accommodate a 10 speed cassette and chain?

Cheers
Paul
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#2
You would probably have to look up your RD on the manufacturers site to see if the specs allow it. If you let us know what model you have maybe we can look it up for ya.
Good maintenance to your Bike, can make it like the wheels are, true and smooth!
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#3
(04-23-2010, 07:39 PM)Bill Wrote:  You would probably have to look up your RD on the manufacturers site to see if the specs allow it. If you let us know what model you have maybe we can look it up for ya.

Thanks for the reply, I have a bit of a mismatch. My deraillers are both ultegra but my shifters are tiagra 9 speed. Having bought a 105 10 speed cassette would I have to change the shifters?
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#4
A 9 speed won't work 9 cogs of a 10 speed cassette.
The gaps between the cogs is different between 9 and 10 cassettes.
See for dimensions:-
http://www.ctc.org.uk/DesktopDefault.aspx?TabID=3946

There is 0.4 mm per cog difference so by the time you've shifted 8 clicks it will be 3.2 mm out.

You will need 10 speed shifters but you may be alright with the derailleurs?
[font=Trebuchet MS]Ride hard or ride home alone![/font]
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#5
derailers don't know how many cogs you have, and most road bikes use a long cage, so you should be fine (although you'll have to adjust the limit screws to be able to shift into that extra gear. it's simple and only takes minute or two.)

if you're not changing the front chainring setup, you can keep the front shifter, but you'll have to get a new shifter for the rear.
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#6
(04-24-2010, 06:59 AM)paulbucknall Wrote:  
(04-23-2010, 07:39 PM)Bill Wrote:  You would probably have to look up your RD on the manufacturers site to see if the specs allow it. If you let us know what model you have maybe we can look it up for ya.

Thanks for the reply, I have a bit of a mismatch. My deraillers are both ultegra but my shifters are tiagra 9 speed. Having bought a 105 10 speed cassette would I have to change the shifters?

You will need a 10-speed shifter and probably a 10-speed chain. That will be an expensive upgrade.
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