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Originally Posted by ancster
The wheels are 19" Sport Design. As mentioned in the initial post the issue I have is with the front wheel/tire. The specs on the wheel are 8J x 19H2 ET 57. The tire is a Bridgestone Potenza RE050 Pole Position - 245/35Z 19.
I have stock suspension on my '01S.
I'm trying to determine what is the largest tire diameter that will fit on the boxster without using spacers with the current suspension.
Thanks for your help.
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Again, I think that you are somewhat confused. When you say "tire diameter", are you referring to the profile of the side wall (aspect ratio) ? If, so, that would have little to do with "spacing". Perhaps, you mean to say tire width. In which case, you would have to calculate the difference between the width of the two tires, taking into account the offset of your current wheels, and see how it would effect your clearance. Personally, I don't think that its so much of an issue of clearance , as I do a potentially poor choice in tire size. In my opinion, running a tire as wide as a 245 up front on an 8 inch wheel doesn't seem optimal. That's quite a wide tire to be matching up with such a narrow wheel. I would have concerns about the tire remaining "seated" under demanding driving conditions. Moreover, from the standpoint of performance, I would think that a tire of that width on the front would cause an awful lot of "tracking". I know that some members of this forum run tires of that size up front. Perhaps, they can comment. However, most "tuners" and enthusiasts that I know typically run no more than a 235 up front and a 275 on the rear. Again, wheel offset can often dictate what the widest tire a person can use.
p.s. Just off the cuff, if you are currently running a 245/35 up front, it would seem to me that you would have to come down to a 30 profile in order to stay within an acceptable diameter.