i'm in the market for new rims, and i'm debating on a wheel/tire bundle from edgeracing.com - w/ a 18by8 rim it's giving me the selection of 215/40/R18 tires ... arent those tires too skinny for 18 by 8's!? wouldnt i need something like 225/40/R18's .... whats the freakin deal here???

Ive got 225/40/18 on mine

and those are wide enough for you correct?

currently riding on 215/35/18 i'm practically riding on rims right now but i'm upgrading to 215/40/18 tires atleast next summer other than feeling more bumps and the weight of the rims i'm good i'm not sure about the clearance on 225/40/18's celicazr is there any rubbing at all in regards to your car.

i thougt the first numbers.... i.e 215, or 225 regarded to the width of the tire - the second numbers ie 35, 40, 45 refer to the height of the tire. can sum1 clear me up on this?

>

the first number is the section width in millimeters, and the second number is the aspect ratio. so on a 215/35 tire the sidewall height is .35x215=75.25mm, 215/40 is .4x215=86mm, 225/40 is .4x225=90mm, and so the sidewall height (and in effect the overall diameter of the tire) is a function of the section width AND the aspect ratio and of course the wheel diameter.

They are wide enough for it.
I reckon they are perfect for it.
Mine doesnt rub at all.
offset
front: +44
rear: +38

I`ve run 235/40/18 with no rubbing at all.