Yes, tires should fit in the 225/55. The 235s will rub. Slight rubbing issues are caused by 2 factors: 1) actual tire width 2) rotor hat thickness. You can check the technical widths on tirerack's site. The rotor hat thickness varies betwen manufacturers and with size. So, brembo may have different hat thickness than Balo. And stock 302mm to an e31 324mm with the same manufacturer.