You maybe having the same problem i have.
Measure your disc, is it 288mm? I had to put 10mm spacers on (probably could have gotten 5mm spacers, but as i was given the 10mm spacers with my wheels, i used them) and there fine now. The rear wheels go on fine without spacers. My spokes on my Azev A rims were touching the caliper hense why it needed spacers

You've probably got the bigger brakes like me on my 8v.