Originally Posted by
Citrus12
I think I'd rather just replace the cheap cranks rather than fighting to bend them just right. My bottom bracket is a sealed square taper. The only writing I could find on it was TB702-2N L:120 C:28. There doesn't seem to be any sort of play in the spindles.
I'd take that as a 120mm length. Different cranksets require different BB spindle lengths. You can either find a crank suitable to your needs that uses a 120mm (or a mm +/- either way usually) or buy a new Shimano UN300 for <$15 of the length required for the crank you choose.