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As long as you use the correct tire you'll be fine.

Without knowing your width I can't tell you the right size though.

Assuming you're running a 7.5" width though you will need a 215/35R18 to have the speedometer work correctly.

-Alex
 

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Well you learn something new everyday...i didn't know the width had anything to do with the speedo, i always thought it was the rim and sidewall size.
 

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so is there a formula to figuring out the tiresize needed to keep the speedo correct, cause I was wondering the same thing but I hav 16x7. Or you could just tel me what size I needed. . .ha ha ha
 

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Thanks! I just found out I've been driving 2 mph slower then I should have. That could explain why I am getting honked at now. . j/k
 

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Yea, in my 626, i was going 4 faster than what was displayed in the speedo
 
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