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Dented B43 Fixable?

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Dented B43 Fixable?

Old 10-03-11, 08:24 PM
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Dented B43 Fixable?

hi there, i have a B43 given to me and i was wondering if this is repairable. what should i do to fix it?
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Old 10-04-11, 03:45 AM
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You can always try to bend the sidewall back, but such a sharp and deep bend it might just crack. One way is to cut a wooden piece to fit tightly between the sidewalls on an undamaged section, insert at the damage and then knock the sidewall back in place with a lump hammer. Might want to use another piece of wood as abugger between hammer and rim.
Or you can use three adjustable wrenches and a helper. Set the jaws to a decent fit for sidewall thickness, use two wrenches to brace the sidewalls where the deformity ends, then use the 3rd to bend the flared section back.
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Old 10-04-11, 06:20 AM
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The only real problem the dent seems to be giving you is in the brake track, so if it isn't deep enough that you're filing through, I'd simply file the track flat so the brakes don't pulse and forget about it.

If you feel you prefer to bend it back at least partway first, use a block or something like a conewrench to spread the load on the good side, and then gently squeeze it back closer to the original line with a pair of pump pliers (channelocks). Go slow and stay attentive, some alloys handle bending fairly well, while others tend to crack instead. Finish by filing the brake track flat.
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Old 10-04-11, 09:23 AM
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No guarantees...do so at own risk. Good chance you'll end up with a crack - maybe blow a tube/tire later on down the road!!!

1. Long narrow (1/2" x 1/2" x 3" ???) block of wood inside the rim that fits very tightly between the sidewalls. Make sure one face has a slight inward curve and that curve is facing the bent sidewall This is too allow some "bend-past" room before releasing the pressure you are going to apply.

2. One long block same size as-is against the non-bent sidewall side of the rim.

3. One small block about 2/3's the size of the bent sidewall against that - helps if the block has a slight outward curve in it - which faces against the bent portion of the sidewall.

4. Assemble the above semi-snug in a wood-vise - so you can make minor adjustments to the blocks in order to line them up right.

5. Apply pressure using the turning handle of the wood vise. Take your time - watch everything while you are progressing with the handle...

6. Stop right when the bent sidewall starts to cross over the normal sidewall line....release the vise being careful not to drop anything.

If you are lucky...all you'll have is an an ugly crease...

A wood vise is not necessarily good for use as a general purpose vise - but I have found it awesome for this kind of work. (Mine is made in England.)

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Old 10-04-11, 09:49 AM
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Old 10-04-11, 09:59 AM
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Originally Posted by Kimmo View Post
If that's true, then he has nothing to lose by trying to save it. Even if it's not perfect it might still tide OK for a while, even a very long while. Or if decent but not good enough for the road, it could be a bad weather or cyclocross wheel. (I never cease to be amazed at the number of riders using new expensive equipment for this sport).

The OP's only real problem is deciding whether to try to straighten it and risk cracking, or just file off the raised metal on the brake track. There's no sure answer because the only way he'll know if it'll crack is when it does.
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