yuepheng479

I have a 2013 G37XS Coupe and I've seen recommendations for bigger tires that are similar to the stock to not mess with spedo etc. that are Front: 245/40r19 and Rear: 275/35r19 but they never specified if this would work with AWD. So should I be able to run this set on my XS Coupe without harming the AWD system or get weird torque vectoring issues or should I run same widths all around ex. 245/40r19 like recommended by most other sites such as tire rack?

blnewt

iTrader: (13)

Here's a link for tire sizes that will work w/ AWD, need to be under 1% diameter, and well under 1% is ideal. I wouldn't recommend running a 275 on your 8.5" width wheels, a 9.5" width is a much better mount on a 275 tire. https://www.myg37.com/forums/brakes-...ml#post3992771

yuepheng479

Thank you for that, it was very helpful. Just one thing I'm not quite sure on though, when you say under 1% did you mean under 1% as in the absolute value of the difference? or, for example, -0.45% diameter difference is different from 0.45 as in terms of fitment? Sorry for the noob question

blnewt

iTrader: (13)

There have been cases where the AWD light will come on at speeds over 80mph when there is a variance over 1%, so to keep from having problems it's best to get as close to zero as possible. In the listings I posted, the minus sign indicates the front tire is the larger one, this isn't as good as having the rear being slightly larger. The rear tires will wear faster so in time the variance will get closer to zero. When the front tire starts out larger the variance will get worse over time. Hope that makes sense. And I need to move this to the wheel tire "info" folder, this section is for reviews of products. HTHs, Brad