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Old 08-01-07, 08:28 PM   #1
TabbyCat
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V-brake jiggles during rotation

So, I just re-entered the biking world a couple weeks ago and I've gotten so into it that I had to take my bike on vacation. Which soon had my husband wanting a bike, which shortly required a rack to bring the bikes home, which dented the mini-van, and . . . as I was walking my bike out this evening I noticed a bit of drag with each rotation. I looked at the wheel but there were no 90 degress angles so I shrugged and went for my ride. It seemed to ride fine (but I'm a newbie riding knobbies on pavement . . .) but I immediately noticed that my front brakes would click and jiggle with each rotation. I've researched a bit and my guess is that this is called wheel wobble and I need to adjust the spokes? Am I out in left field here?

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Old 08-01-07, 09:05 PM   #2
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I'm no skilled mechanic, but it sounds like your wheels are out of true, or at least one of them is. Personally, I'd take it to a LBS to get them trued. I would want to either take a class in wheel truing or be shown (in person) how to by someone experienced before I'd tackle that myself.
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Old 08-01-07, 09:11 PM   #3
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You are in the ball park! Spin the wheel and keep your eye on the brake pad. Watch the rim and tyre as they fly past the brake. With a good wheel will see the rim and tyre moving in and out from the brake a tiny amount as it spins, no more than 1mm. Your wheel sounds like it will be jiggling past the pad with a lot of movement in and out. It could be just the tyre, but it could be a dinged rim or buckled wheel.

A broken spoke will cause the wheel to buckle - check the spokes by giving each pair a squeeze.
A wheel that is buckled from an accident may have broken spokes, but some will be looser than others.
A ding in the rim, like a dent, is the worst - best take it to the doctor for a transplant.
A rim that has a smooth wobble can be straightened by adjusting the spokes and replacing any broken ones.
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