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-   -   2010 G37x Coupe stock 18 inch wheel tire choices? (https://www.myg37.com/forums/wheels-and-tires/290448-2010-g37x-coupe-stock-18-inch-wheel-tire-choices.html)

Dan G37 10-16-2018 05:24 PM
2010 G37x Coupe stock 18 inch wheel tire choices?
 
So I'm in need of new tires and was wondering which square setup I can for my AWD system.

I accidentally got 235/50/18's on right now and might return them and change them because of the 1.5% difference from what the stocks were before.

I want to run 245/45/18 but not sure if they are too wide for my car. Any help and input would be greatly appreciated! Also found out that they only have a .66% difference.

Or lastly should I stick with the stock 225/50/18?

Thanks in advance!

MH2013 10-16-2018 08:52 PM
You should be fine with the 235s. I have a 2013 awd coupe and ran 245/45 on my stock wheels before upgrading. Had them on for over a year with no issues.

Dan G37 10-16-2018 11:47 PM
Originally Posted by MH2013 (Post 4218116)
You should be fine with the 235s. I have a 2013 awd coupe and ran 245/45 on my stock wheels before upgrading. Had them on for over a year with no issues.
Thanks for the reply! Won't the 1.5% difference mess with the AWD system? Also how wide were your wheels? 8'' or 8.5''?

MH2013 10-17-2018 06:20 AM
My stock wheels are 8” and have 245 on them.
235s won’t be a problem. The thing to watch for is if you choose to run staggered sizes front to rear. That’s when having different diameter tires the percentage is critical. A square setup where all 4 tires are the same size 1.5% will be fine.

Alakki37x 10-20-2018 04:45 PM
Same problem
 
Im facing the same problem with mine, i already have 245/40/R18 winters from my last car and im wondering if its too wide or too thick. Also should i save my summers from my previous car, theyre 255/40/R18

slartibartfast 10-20-2018 08:34 PM
The 1% diameter differential only applies if you run staggered wheels, you don't want to exceed that difference in rolling diameter for AWD cars.

I've seen 3% tossed about for overall change in rolling diameter, the ECU or TCU stores the OE value for whatever reason.

Dan G37 10-21-2018 10:37 AM
Originally Posted by slartibartfast (Post 4218551)
The 1% diameter differential only applies if you run staggered wheels, you don't want to exceed that difference in rolling diameter for AWD cars.

I've seen 3% tossed about for overall change in rolling diameter, the ECU or TCU stores the OE value for whatever reason.
Ahhh got it! Thanks for explaining that! I switched to 245/45/18's and haven't been happier the handling is so nice!

Dan G37 10-21-2018 10:38 AM
Originally Posted by Alakki37x (Post 4218529)
Im facing the same problem with mine, i already have 245/40/R18 winters from my last car and im wondering if its too wide or too thick. Also should i save my summers from my previous car, theyre 255/40/R18
I switched to 245/45/18's on my stock 18/8's and they are wonderful! Couldn't be happier!


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