I just realized the last time I had tires put on, about 2 months ago..... they put 245-45-18's all the way around, we're supposed to have 225-45-18 on the front. Is this bad? What would this cause if anything? I'm running Stock rims.....

 

You're fine with the 245s in front. When I had OEM wheels that's what I ran and it made my G more stable. I never liked the idea of running 225s in the front....
Gary

 

at least now u can rotate all 4 tires

 

True ; ) BUT........ are all 4 rims the same size? I thought the front rims were not as wide?

 

Factory uses weaker load index tires on front to increase understeer as a protective measure. Slip angles on front are higher than rear as is transfered weight.

 

so front and rear rims are identical, and can be swapped?

 

You can swap the tires but not the rims, the rears are wider..

 

that's incorrect, the OEM 18s are all 18x8

 

hmm.... so i can swap front to rear. label inside door still lists two diff tire sizes though, so that is only for steering purposes i guess. me thinks i will break out the tape measure to double check

 

do as you wish but the OEM 18s are 18x8" all around. They just run staggered tires

 

would there be uneven tire wear in the front if 245/45/18 were fitted? think the alignment would need to be adjusted?

 

think i am starting to find my answers digging through all the search information =)

 

forgot to post this but you CANNOT put the rear rims on the front, I had pics but the offset of the rear is different, they won't fit, I've tried will post pics if I can find them, the difference is very obvious looking at it from the inside of the rim

 

why not?
if you have coupe stock 18s
its 18x8 on all 4 wheels


actually i have been searching about using 245/45/18 on all 4 wheels on a coupe and it seems like the op stated it works so that is good.

 

The offset is different, take a front and back off and look at them side by side (the insides) u can even try to pop a rear on the front it WONT go