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convert 9spd STi to 10spd ?

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convert 9spd STi to 10spd ?

Old 02-02-08, 05:04 PM
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earleybird
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convert 9spd STi to 10spd ?

is it possible to convert 9 speed Sti levers to 10 speed by changing rachet and other internal parts ? in other words if I had a 9spd Ultegra RH lever which I wanted to convert to 10 speed could I buy replacement 10 speed rachet and parts to fit ?
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Old 02-02-08, 05:12 PM
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Sheldon Brown
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Originally Posted by earleybird View Post
is it possible to convert 9 speed Sti levers to 10 speed by changing rachet and other internal parts ? in other words if I had a 9spd Ultegra RH lever which I wanted to convert to 10 speed could I buy replacement 10 speed rachet and parts to fit ?
Nope. This is doable with Campagnolo Ergo stuff, but not with Shimano STI.

Note that the Shimano 10-speed STI brifters are MUCH improved over the 9-speed ones, the number of speeds is not the only, nor even the most important difference. In fact, I recommend the 10-speed version even for 9-speed applications, due to the improved ergonomics of the 10-speed brifters.

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Old 02-02-08, 05:34 PM
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thanks Sheldon. If you can't do it I know it can't be done .
Shame . There are a lot of cheap Dura ace 9 speed STi levers around at the moment. I thought it might be a cheap way to upgrade to 10 speed
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