What size

[gigrbite@hotmai]

Hello all
I just bought a 2003
BMW 540i. 4.4
It has chrome BMW wheels 18 inch and I can't find out what size tires to put on it,unfortunately it has 3 different sizes on the car now.please help thank you

[Sovereign540]

It's going to depend on what the width of the rims are. Do you have the dimensions of the rims? Have you taken the wheels off to see if they're stamped or cast on the backside telling you the dimensions? Have you measured with a tape measure?