i need to tires for my car and i want to put fatter tires on the back (bigger then 225) and i was wondering the biggest size i can put on the stock 18 rx8 rims.

 

Here's what I did....

I SEARCHED (the button on the top right). I used the keywords: "stock rim width". I learned the answer to your question.

I'm smarter than you.


Seriously. What if you are unable to search, perhaps a wood chipper accident? Well the answers are: 8" width. 245/40/18 tires fit perfect.

Now you are smart. Prepare to be flamed, though.

 

wow...

not trying to be a dick, but def. search, you will find a lot of answers that many people have posted before. I've learned a lot from some of the very knowledgeable people on here... just look around and you'll find some good info.

 

i got 255 on the back of mine

 

there appears to be 5 related threads on this very subject at the bottom of this very page...