Please help, ordering HRE 890r for my TT. I have seen alot of discussion about the diameter ratio being close to stock. What is the correct tire size to be able to go to the 325 rear on a 20" wheel.

 

I am running 325/25/20 on 20 by 12 Rinspeed rims on the rear.

 

If you explain it a little better I can help. What exactly are you trying to ask? If you are ordering from HRE, they will give you the recommended tire size for the wheels you are getting.

 

I guess what I meant to ask is if I am running the 325-25-20s on the rear, what size tire shoould I run on the front in order to maintain an acceptable radius as not to screw up the AWD system. I am not sure of technical term.

 

Donboesch,
I have had the P2S's on my car from Brand new and they work excellent on the road and track. I have the 245/30 ZR-20 on the fronts and 325/25 ZR-20 on the rears. This wheel and tire combination are almost identical overall diameter as the factory OEM tires.
Max
P.S. If you would like I could furnish you with some pictures

 

Max has the correct tire size, as its 1.4% difference from front to rear. 245/30 is the size you should use.

 

how is your luck getting tires in this size? Tirerack is backordered for anything in 325/25/20 or 305/20/20..

 

I bet 325's look thick!

 

OnecleanM3,
If you would like I could email you a picture? I believe they look great.

 

325/25/20 rear is the proper size with 245/30/20 front

 

Sucks to be them, I just sold a pair of PS2 in the 325/25/20.

 

it's not only them, most ppl don't have them.

I actually have a couple of the 325/25 PS2s....we just don't have the matching fronts 245/30....

I have a few matching sets in Pirellis, but we are saving them for our wheel orders.

 

I appreciate the input. Wheels and tires ordered. Cant wait!

 

where did you get the 12 from. I think RINSPEED makes only 20x11.

 

The 12s just came out...we have them in stock if anyone needs them