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old bike upgrade(5 posts)

old bike upgradeken425
Jan 9, 2004 4:12 PM
I'm thinking about buying an old, steel-framed, 6 or 7 speed bike cheap, spreading the rear triangle per Sheldon Brown, and putting on Ultegra 9 Speed STI brake/shifters, modern wheelset, and modern 9 speed cassette, all of which are lying around my garage. What other parts will I need to make this work? I'm thinking chain and derailleurs, but I'm not sure about chainrings. Also, if I need new chainrings, will modern chainrings mate with an old crankset? If not, am I also looking at new spindle, bottom bracket, etc.

Obviously, I'm trying to do this on the cheap. This would just be a rain bike/training bike.

Thanks for your help
Here's the catch...russw19
Jan 9, 2004 7:14 PM
Unless you happen to have a friend donating a frame to you, you may run the cost up pretty quick trying to make parts compatible with both the frame and your pre-existing components.

Before you go down this path, I would suggest you check around and see if you can just get a full bike that may be an older 6 or 7 speed. I work in a college town, so for me, it's easy to find good bikes cheap. As students leave, they sell bikes. Last year I bought a 7 speed Suntour Superbe Trek built out of Reynolds 531 tubing for a friend of mine. I paid $70 for the bike and then put a new seat, bars, tape, pedals, and new tires. Total for the project, $145. Not bad at all considering I could have sold that same bike in the shop I work at for around $300 easy.

Just trying to throw monkey wrenches into your thought process.

Russ
Might workDave_Stohler
Jan 9, 2004 7:53 PM
If the chainrings are the same standard (130mm BCD 5-bolt??), you can switch them. You'll also need a downtube-STI converter thingamajig.
I wouldn't.Spoke Wrench
Jan 11, 2004 5:55 AM
You will be able to make it all work if you work at it long enough and manage to dig up, fabricate, or bodge together the stuff that you need. When you get done, however, you are going to have an old bike with a hodge podge of some newer parts. It's going to cost more than you think it will too.

Now if you're working with FREE stuff, that's a different story. Look around long enough and you WILL find a 6 or 7 speed road bike that nobody else wants.
I wouldn't.eddie m
Jan 13, 2004 11:39 AM
The only worthwhile upgrade to a 6s bike is to convert it to fixed gear. By the time you change the hud, deraillers, chain, you probably need a crank and BB, and maybe brake calipers.
The only 6s stuff that is still worth riding either has new old stock components, or Campy Nuovo Record or both.