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Old 07-12-10, 05:37 PM   #1
joe pike
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7 speed to 9 speed

I have an old 7 speed bike with down tube shifters. I want to convert it to a 9 speed with STI shifters. Can I just put on a new wheel with a 9 speed hub, a 9 speed cassette, 9 speed chain and 9 speed shifters? Anything else I need?
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Old 07-12-10, 05:43 PM   #2
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Upgrading to 9 speed is a waste of time. If you're going to upgrade, upgrade to 10. 9 speed is old and obtaining parts will be harder and harder. Think about this before you dump money into a group that is nearly 3 generations old.

Also unless your 7 speed bike/frameset is extremely nice, it is not a very cost effective way to do this type of conversion. Getting parts at wholesale or waiting for closeouts will bring the price down but which is offset in actually having to wait to build it piece by piece. A 10 speed full 105 quality bike will be approximately $1-$1.5k. That's nothing. The retail on that group will be close to that.
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Old 07-12-10, 06:29 PM   #3
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You may not actually need to replace the hub, what hub does your rear wheel have now?
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Old 07-12-10, 06:31 PM   #4
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Think Sram i9 9 speed internal gear hub , or soon to be released shimano 11 speed IG hub ..

want race bike with 9 speeds , Just go Buy one , frame spreading ..needs to be 4+ mm wider .. and all the index mech replacement will be brutally priced as aftermarket Groupset.
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Old 07-12-10, 06:36 PM   #5
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i upgraded an old steel frame with rx100 to record/chorus/centaur 10 speed.

call me young and foolish:
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Old 07-12-10, 07:15 PM   #6
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Originally Posted by operator View Post
A 10 speed full 105 quality bike will be approximately $1-$1.5k. That's nothing. The retail on that group will be close to that.
That's assuming he buys the whole 105 group. He only really needs the shifters, front derailler, cassette, and chain. All that can be had for well under $500, and likely under $300 if you shop around and buy the STIs used.

If you're not concerned about the latest and greatest, Sora STIs and the components to convert to 9 speed can be had for about $250.
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Old 07-13-10, 05:11 AM   #7
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Quote:
Originally Posted by joe pike View Post
I have an old 7 speed bike with down tube shifters. I want to convert it to a 9 speed with STI shifters. Can I just put on a new wheel with a 9 speed hub, a 9 speed cassette, 9 speed chain and 9 speed shifters? Anything else I need?
To answer your question - yes but you probably only need a freehub body as long as your hub is a not a freewheel type. Also, you may not need to spread the frame - many in the early 90's were already manufactured to 130mm and a spacer was used on the axle. I'd consider gong to 10s as well, though that was not your question.
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Old 07-13-10, 09:29 AM   #8
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7 to 9 speed

Thanks for the help. I think I will consider a 10 speed or maybe a new (newer) bike.
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