Quote:
Originally Posted by Sotosound
So European rim sizes are measured in inches?
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If you check your car's handbook it will tell you what the recommended/advised tyre sizes are for it.
As pointed out by other posters almost all wheels are of imperial diameter - Ford Granada 2.91 Ghia/Ghia X were the only other mainstream cars with metric diameter (390mm IIRC) wheels.
Unless you are planning to fit cross- or bias-ply tyres or have one of the above-mentioned cars the tyre will have a metric width measurement, a %age aspect ratio and an imperial internal diameter (e.g. 185/70/15 is 185mm wide, has a sidewall height that is approximately 70% of 185, and an internal diameter of 15 inches). Cross- and bias-ply tyres used imperial units for both width and internal diameter (e.g 6.40/13 is 6.4" wide and has a 13" internal diameter).