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This is not going to work. You won't permanently change the shape of the rim by just smooshing it between two concrete discs, as in order to permanently bend metal you need to exceed the yield stress of the metal and plastically deform it. This means that to bend something to a shape, it has to be precisely bent further than its ultimate designed bend, then ...


I'm not a metallurgist, but I would think that once the rim is bent enough that you're looking to straighten it, it's been weakened enough that I wouldn't trust it for riding on.

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