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Easy question for you wrenchs' out there....(7 posts)

Easy question for you wrenchs' out there....eyebob
May 1, 2003 10:34 AM
My 105 8-spd brake is sticky (shifts fine). In the past I've tried to correct this with lube, but eventually it took having the cable replaced. NOw the other side is doing it. Since I didn't do the work on the other one myself my question is this. Do I need to unwrap the bar tape to replace the left (front) brake cable on the STI shifter?

Short answer: No. But....cory
May 1, 2003 10:49 AM
Actually I don't have STI, but I've never seen a shifter where you COULDN'T thread new cable into the existing housing, and if you have to pull it out to lube it anyway, you might as well use a new one. Somebody will tell both of us if I'm wrong.
Be sure to check everything that moves in the whole system, too. All the pivot points and whatnot could benefit from cleaning and a drop of lube.
Don't be afraid of rewrapping the bars, by the way. It's a minor challenge the first time, but fun, and it can give the bike a fresh look. Mine always run better with new tape.
Maybe yes, maybe no....MR_GRUMPY
May 1, 2003 10:55 AM
It might work, but don't be supprised if it doesn't.
Maybe yes, maybe no....russw19
May 1, 2003 11:35 AM
If your brakes are sticking it is becuase of excess friction. If you have a kink in the housing, the cable is hanging on it. A new cable will still hang on the housing if you don't replace it. So if you are going to replace the cable, take the extra 10 minutes and 2 dollars and do the housing to. In that case, yes, you will have to retape your bars.

Check to make sure it's not your brake pads hanging up on your rims too. And lube your brake's pivot points and return spring. That should cover it all.

May 1, 2003 11:33 AM
Make sure that you operate the inner lever several times, It helps if you are pulling lightly on the cable.Disconnect the cable from the derailleur and grasp the cable a little below the cable stop and push the wire into the housing while you are applying the brake. You will see the cable end emerge from the shifter, grab it and pull the cable out. You may have to cut the cable where it is fouled up from the clamp screw. Otherwise it may foul up the liner of the housing. Lubricate the new wire and push it into the shifter and housing. Attach to derailleur and adjust as required.
OOps got off on a tangent when I read shifter, sorry.curlybike
May 1, 2003 11:39 AM
If you trim the end off of the Brake cable before you remove it, that will help. If the original builder put the housing in after grinding the end square, you should have no trouble sliding a new wire in.
Not usually.Spoke Wrench
May 1, 2003 5:33 PM
My recommendation, if you haven't done it before, is to take a flashlight to peek inside the brake lever first so that you can see where the cable goes and how the round brake cable anchor mounts to the lever.

I've had about 95% success in replacing brake cables without having to unwrap the bars. NASA's Murphy will clue you in on which bike is likely to be the 5%, when it will happen, and how well the tape will survive the unwrapping.