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"Shifting" over to STI?(6 posts)

"Shifting" over to STI?crestlinefarm
May 20, 2003 12:44 PM
Please be nice--no snickering at the new guy!
I have a frame that is currently setup with downtube shifters. What does it take to "shift" over to STI?
Are the shifter brazes on the downtube still used? I know it's almost too much to ask that manufacturers would keep this one thing consistent....
I took a look at a friend's setup and without taking her bike apart, it appears they are used to mount the barrel adjusters and also route the cables. Am I on the right track?
You are correct..Dave Hickey
May 20, 2003 1:30 PM
The barrel adjusters mount on the downtube bosses. It's not hard to switch to STI. What speed and brand is your current setup? The only issue might be compatiblity with the STI shifters and the derailleurs.
re: "Shifting" over to STI?arderra
May 20, 2003 3:12 PM
Yeah, Dave is correct. Just out of interest, what age is the bike and groupset? You may be better off getting a new bike or at least a new groupset. This is purely because the existing block, chain, deraileur(?)and maybe even the chainrings may be so worn that with the new sti levers, your gears may keep jumping. If it does, the first thing to check is the deraileur(?).Stand behind the bike and grab the bottom cog on the deraileur. Move it from left to right and see who much it moves. If it moves too much then the derailuer is worn and that is more than likely why the gears slip.

Hope I didn't panic you!!
Watch your rear endKerry
May 20, 2003 5:12 PM
The odds are good that your bike is narrower in the back end (fewer than 8 speeds) and so would not accept a modern 9 speed rear wheel without first spreading the rear triangle. No problem if it's steel, but it could be a problem if it's aluminum. Given the likely age of your bike and the cost of an upgrade, you might consider replacing the bike instead. You could get a pretty good used modern bike for not much more than your upgrade might cost, and you'd get the whole bike upgraded, so to speak. Consider this carefully before proceeding.
Thanks for the advice...crestlinefarm
May 21, 2003 7:38 AM
I have the opportunity to pick up a complete STI bike with a frame that is WAY TOO SMALL for me for a lot less than the individual components would cost. So the entire STI drivetrain will move over to the old frame.
Great idea....Dave Hickey
May 21, 2003 9:45 AM
Just make sure your current frame will accept 130mm rear spacing. I've done the same thing and sold the frame.