Quote:
Originally Posted by toast
I got a set of 17x9 wheels and 245/40R17 tires. 245 is supposed to be in mm, which is 10". Mounted on the wheels the tire is stretched. WTF is up with that?
I'm ranting because my wife just curb rashed one of my new wheels and while that is all on the fault of the driver if one were to mount a supposedly 10" wide tire on a 9" wheel one should have some freaking rubber to scrape on a curb before metal. I'm assuming the wheel width is the width of the barrel, is that correct? Based on what I see I could have saved weight and went with 17x8 rims for the same tire and had the outcome I was expecting.
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Your tires are probably "squared" on that set up, especially a thick/broad shouldered sidewall tire (not to be confused with the "rim" guard". They may appear stretched if you have a thin/narrow shouldered sidewall tire.
Wheel widths are actually measured inside to inside bead. 99.9% of wheels have a standard .5" "J" flange tire bead on each side which then equals 1" total width outside to outside.
