Hi guys,

What tire sizes would you install on 20x8.5 and 20x11 wheels?
The classic 245/30 and 325/25 is too wide I believe.
I don't wanna screw with the awd.
It's a bit of a newbie question and I searched around real quick, can anybody point me in the right direction?
My car is a 997.1 Turbo soon to be lowered.

Thanks!

 

Is it 305/25/20 and 235/30/20?

 

This calculator will help you check and see how different sizes compare.

You will want to keep the variation between the tires at less than 3% or so to ensure you don't trash the AWD system.

http://tire-size-conversion.com/tire-size-calculator/ (use the second tab: Tire Size Comparison)

 

Thanks buddy!
I know about the tire calculators it's just that sizes are impossible to find lol
It seems like 315/25/20 would be perfect (0% difference with oem size) but nobody makes them.
It's hard to find a size combo that one manufacturer offers both and are available! The 20" wheel game is kinda discouraging haha
I want confirmation from other people on what they use on a 20x11. I've found that some people put a 325/25 enven though it's not recommended but they are hard to find as well.

 

Toyo makes T1R 315-25-20 in size and you can buy them from Tirerack. I'm running them on my 20x11 street wheels and having zero issues. I'm running 245-30 up front and Tirerack confirmed that I can run this combo without any problems.

 

If you use the regular calculator on the page suggested instead of the comparison it looks like it shows you tires that come in the size you put in.

 

I searched by size on Tirerack and they only have Michelin Pilot Cup in that size 😔

 

They must have been sold out. Found another source with a great price.

http://www.discountedwheelwarehouse....6590&pID=76722

 

No 315/25/20 anywhere!

Do any of you run 325/25/20 on an 11" rear? It's not recommended but I read Champion uses that size with their 11" rear without any issues.

I think I just won't buy the wheels even though the deal is good! lol

 

I widened by 20x11s to 20x12 for that exact reason.

 

yes. they are on champion wheels-but not available anywhere.