tato63

Replacing original 225/45 18 on my 2012 TC. Wanted to see if 245/40 18 will fit w/out rubbing. The car has not been lowered,

Thanks.

HOODedDutchman

On stock wheels ? No way you want 245. I have 235/40r18 on my stock wheels. Stock tire size of 225/45R18 is definately optimal for stock wheels. First number is the width, second number is % of that width which equates to sidewall size. If you want a slightly bigger tire could go 235/45R18 or 225/50r18.

Basebllstar

Can I ask why?

tato63

Just want to go a little wider.

Basebllstar

Why not upgrade wheels too?

tato63

Money.

HOODedDutchman

225 is like the max width for a 7.5" wide wheel. Even 235 is too wide for the wheel but can work. 8" wide wheel is optimal for a 235.

Basebllstar

Ahh yes. Cut all the corners then.

jcraff3

yea man idk why you would go so much bigger unless it's a misspell lol but hey question dude. im getting 18x8.5. 1" larger than stock, i never cared for stretching so how in the damn world do i figure out what smaller tire to purchase? i know how to calculate tire size but have no idea what fits better on a 8.5 whee or how to figure out direct fitment in general, just convert the 8.5? so i can get the 224, 235 etc?

HOODedDutchman

I'd go 245/40r18. Give you about same sidewall as stock tire (slightly smaller) but with the extra width you need.