Question: 18's on IS 250 AWD
 

I just recently purchased an IS 250 AWD a few days ago, I already ordered the g-spyder rims with each one being the same size 18x8"

My question is...what size tire should I get for it? I'm assuming the 225/45VR17, any help would be appreciated, thanks!

Nope...225/45VR17 is your original tire for the 17in. rim. 18x8 you should go with 225/40R18 to maintain the overall diameter.

I would go 235/40/18

I would get 235/40/18. If you don't mind..where did you get the wheels from and how much? Thx

205/35/18 =]

I was suggesting 225/40R18 only because its as close as you get for overall diameter difference (0.44%) of this and OEM setup for AWD. However, 235/40R18 works too...not as close, but still within 1.7% difference, so it should be ok to use.

I actually found them on ebay, just search for g-spyder rims. And I got them for $880 with shipping.

No thanks.

lol I hope that was a typo

I'd stick with 225/40-18

i'm riding on 225/40-18 on my 18x9 volks.

next set of tires i'm thinking about changing it up