i have an IS300 all wheel drive, i have some bent wheels, need to replace wheels and tires, for the wheels am going after market and i would like to know if i can use 19 X 8.5 on rears and 18 X 8 on front? and what tires size should i use. not planning on lowering the car. i have the stock 18 x 8 front and 18 X 8.5 rear and it's hard to find a wheel with this off set. Trying to find something that won't mess with the traction control. Thanks in advance.

 

Why are the rears bigger than the fronts? Wouldn't it make sense to do all 18/19 wheels. 8.5 front and 9.5 rears which is stock fitment widths. I think if you are following near stock settings what people have been telling me is to go as high of a offset as possible.

 

from what i can see these came with all type of different wheels depending of which model 300 it is, i bought the car use 2 years old so i have no idea. and that's why i need help. i just look at the book it came with and it has four different wheel sizes. According to the door sticker in the front the tire size is 225/40/18 and the rear is 255/35/18 the only thing is the front rims are 8 wide and the rear are 8.5. Cant find many wheels with that offset.

 

Just realized you have a AWD, and let me correct my mistake. Stock front should be 8 and rear should be 9 I believe. I'm not a wheel and tire expert since it's beyond me.

 

Don't get a staggered setup, it is not necessary.

Just buy 19 x 8 or 8.5 on all four corners and save yourself the hassle. Look for around 45 offset.

 

Ok, can I just put 18 x 8.5 in all four corner? And what offset do I go on the wheels? I want to stay with the same stock tire size, I just don't know if going with 19's if it will mess with my traction control, with the AWD System.

 

Plus do you loose any ride quality with 19's? And what would be a good tire setup For 19's?

 

Your tire/wheel size is identical to mine on the 2014 IS350 F-Sport.

I kept the 18's, but drastically increased the tire size to 255/45/18 rears and 225/50/18 fronts. No issues with rubbing, AWD, traction control, etc. MPG is slightly better, the odometer is off by 2-3mph at 60mph, but that's easy to address. The cavern between the tire and wheel well is gone, and it's much safer than dropping it by 1-2". Ride is much smoother and my worries about bottoming out in the East Coast potholes is no longer an issue. I also seem to be getting longer tread life.

You will lose some ride quality with the 19's since the tire profile will be smaller, meaning less air and rubber between the wheel and car. But if your goal is faster cornering, the 19's will be better, although your 0-60 will be slightly slower (~.2 seconds slower).

 

Thanks for that info. What offset on the wheels did you get with the 18's.

 

Stay close to OEM so around 40 if you go for 8.5

If you go for 19"s you'll need to get a thinner sidewall. Might be a bad idea depending how the roads are where you live.

 

You can do 18x8.5 square setup...just use 255/35/28 tires all around.
As for offset, You can do between +30 and +35 for a flush look with no rubbing issues...if you are staying at stock height.
If you want to do a 19 inch square setup, you can do 8.5 (+30 to +35) or even 9. Tire size would be 235/35/19.