Originally Posted by RostokMcSpoons
"255/35 R18 [90Y] Bridgestone - Potenza RE050 EZ RFT". Note the 'EZ' and the fact that the speed rating is Y whereas the BMW fitted tyres are W rated....
Is the 90'Y' the speed rating??
I thought the 'Z' as in 225/35 'Z'R18 was the speed rating?