I should be picking up my 2009 X coupe this weekend. I'm planing on putting snow tires on the stock wheels.

Would the slight difference in diameter of the sport wheels be a problem for the AWD system for summer tires? I really like the way they look, but am wondering if I need to keep identical sizes because of the AWD system.

According to the calculator here, the rears on the sport wheels are .25" smaller in diameter.
Tire Size Calculator - Discount Tire Direct

 

From what the manual says all tires/wheels must be the same. Whether that's 100% true or not, I do not know.

 

I believe the AWD system is fine up to a 10% difference in diameter, max. I would usually try and stay within 5%.

Stock sport wheel/tire combo is appx 9% different.

 

Thanks, it looks like using sport wheels on an X coupe should work, but probably isn't a good idea.

 

Should work fine as long as the tires diameter is close. Use one of the tire calculators to play with sizes....or just go 245-40-19 all the way around.