whats the widest alloy wheelu can have on a lowered rst i have 205\40r17 oz superleggeras and they are rubbin awat at the arch line and snatching the steerin gettin rid but want 2 know az a guideline az i have already checked traking ect

 

i had 215 35 18 tyres on a 7j et 40 rim on my old s2 cab turbo lowered 40mm and there was no rubbing even fully loaded