Newbie with wheel/tire questions...

[AndyMan04]

Hello everyone, just recently signed up...



I just recently got my 2011 SHO and absolutely love the car!!! I have been doing alot of reading on the forums and recently read that the AWD system is majority set to the front of the wheels hence it being economic based so that through out the idea of pursuing a staggered wheel set up (just for looks).. something among the lines of 60% front to 40% rear at max throttle.

Anyway, I have the factory 19 inch wheels and wanted to find and upgrade to the OEM 20's from the 2013 models. My question is concerning the tire width. The 19's have 255s and the 20's are rated at 245. The tire aspect ratio are both rated at 45. I would think that a factory tire that is 255/45/R19 should be able to keep the 255 rating the max width.
Is it possible to set up a 255/40/R20 tire without rubbing?
I would love it if i would go wider but it looks like 255 is probably the safest it can go. I would love to hear everyone's feedback regarding this thought.

I like the fact of having wider wheels and tires set up for an AWD system but don't want to go overboard with it.
Thanks for your input,
-Andy

 

[thebigjimsho]

Welcome. The numbers you need to worry about are width and total rolling diameter. Or, in other words, tire height. A 255 tire that is X tall will work if it's on a 15" or 22" wheel.

Now, what could change that is differences in wheel offsets/widths as you go larger/smaller.

 

[Boggus]

Just throwing out some numbers:

255/40/19 has a width of 10.08 inches
245/45/20 has a width of 9.65 inches
255/45/20 has a width of 10.12 inches.

 

[EcoBrick Bob]

While most tuners can change the speedometer to fit the tire height... If you don't want to do that, just make sure your new wheel/tire combo has the same diameter tire. Factory offset is 38. You don't want a much higher one, but you can go lower, which means the tires stick out farther. I am running 32 offset on my Flex. If you want to go with a great staggered set. Check out BPD's TSW Nurburgrings.

 

[AndyMan04]

Thanks for the feed back. Greatly helps.

 

[thebigjimsho]

I ran Nurburgrings as track wheels on my V. An excellent option...