What are the E28 M5s factory wheel and tire sizes?
There were two available factory wheel and tire sizes for the E28 M5. Early European-spec cars have metric-sized wheels measuring 195mm x 390mm with 220/55VR390 tires. Later European-spec examples, as well as all those sold in North America and South Africa, have 7.5×16-inch cross-spoke alloy wheels with 225/50VR16 tires, usually Pirelli P700s.