I need help. This week I went from 18 inch alloys back to standard 17 inch Ronal Avus alloys with new Michelin tyres. (To get rid of scrubbing). The car is fitted with bigger than standard Brembo HC discs on the front. Everything seemed fine during the swapping process, I removed the 10 mm spacers that were used for the 18's, and put the long bolts to one side and stuck the 17's on with new shorter bolts. Set off for a drive, and within metres I heard a noise which sounded like I'd forgotten to tighten the bolts on one of the wheels (I hadn't obviously) but then within a second it went away. The worrying thing is there's a grinding noise from the front wheels, it's there all the time when on the move and is not suppressed by braking and it feels like the car isn't able to completely free wheel. I've looked at the wheels and there doesn't seem to be anything obvious rubbing, although the calipers are close to the back of the spokes. Can anyone help? Can I not run these wheels and discs together? I've only driven a handful of miles because of this issue.