Optimal 18 inch tire size

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04-11-2003, 07:56 AM

DR0832

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Join Date: May 2002

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Optimal 18 inch tire size

Is the optimal tire size for 18 X 8 inches rims 235/40/18 or 235/45/18, or 245/40/18 or 245/45/18?

Also can some post the optimal 3ize for 19's. I wish I could search. It would be a lot easier.

04-11-2003, 08:25 AM

sandman1098

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its 235/40/r18 and 235/30/r19.......... those are the optimal tire sizes.......

check out www.miata.net/garage/tirecalc.html

04-11-2003, 09:58 AM

global_threat

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Quote:

Originally posted by sandman1098
its 235/40/r18 and 235/30/r19.......... those are the optimal tire sizes.......

check out www.miata.net/garage/tirecalc.html

I don't know where you are looking, but I have never heard or seen anyone running a 235/30/19. I run 235/35/19, and that is what I am recommending. You are correct on the 18 inch size, though.