How long were the bolts? Standard is 28mm, so +15mm for spacing, you should have bolts around 43mm, 45mm will be fine.
It can be easily seen when installing if the bolts were too long, other than that, check for anything obvious, it can only be related to wheel play/touching or bolts as theyre the only things you modified, Jack wheel up, see if it spins free and straight, any play, then check bolt size.