ExMB

Don't see either in 20" which is GT4 sizing. .Link to those?

WillyDaP

Would imagine the individual has switched over to a set of 19 inch wheels , as I know of 3 GT4s and a GT4RS that has gone with that inch smaller wheel to get more tire choices -- pretty common with many Trackrats!

GT4Lover

Tire rack sells near GT4 sizes. For CR-S they have 255/35/20 and 285/30/20. I've seen that setup used quite a few times on OE GT4 wheels for the extra front grip and reduced rear width to allow for more rotation.

ExMB

Understand. But that combo also changes the rake and will affect the aero requiring additional changes for optimal. Not only that but a 255 on a 8.5 wheel, not sure how much additional grip that much pinching will do.

bobodrink

Have CRS v2 on my 997 GT3RS and GT4RS, they are much faster than Cup 2 and similar grip level to the RE71RS, just slightly slower than the Cup 2 R but last a lot longer. I was about 2 seconds faster changing to CRS from Cup 2 on a 2.5 mile track. They ride just a little stiffer but miles better than AR1.

These new performance tires RE71RS, Supercar 3R and CRS are really leaps above cup 2 now.

GT4Lover

They also do make a 245/35/20 if you're so concerned with rake. I think those tire heights would create a negligible impact on rake. Understand the GT4 already doesn't make much downforce and changing the rake so slightly wouldn't impact downforce production a noticeable amount. We're talking differences of 1-5 pounds of downforce, if that, with how small the changes in height would be. It certainly wouldn't affect handling either. Understand the GT4 is not a slow car. But it's also definitely not a race car where changes of less than an inch of height will make a noticeable change to the downforce or handling balance. The car doesn't even make much downforce at track speeds. Not to say the aero elements on that car are unimportant but they are not as sensitive as you are making them out to be. Also, the Nankangs already runner wider and taller. I wouldn't be surprised if the 245/35/20 Nankang is taller and wider than a Cup 2 of the same size. The same would go for the rears.

85Gold

Smart track junkies don't let friends run PCCB and 20" wheels, 19" FTW.

Peter

ExMB

So not GT4 sizing but -1 sizing. And then no 295s available.

TRZ06

I would go with 245/35/20 & 285/30/20

If you look at the track width specs on the 285's, they pretty much match the OEM 295's. Also, the height of the 285's are only .2 inch shorter. 26.8 instead of 27

You also gain a full 1" of track width on the fronts with the stock sizing.

Sounds like a winning combo to me. You get to dial out some understeer, while gaining grip on both axles.

If the SC3's get delayed past Feb. (which is their current in stock date), I will probably give that combo a try instead of going back to the AD09's

WillyDaP

Solid advice from Peter the Farmer , he is just planting the seed to make sure all his friends check out the tire options for ...................19 inch wheels. Gotta agree, ifen du bist ein Track Ratte, 20s suck for options.

smithsonga

Any updates on verifying you get V2 version?

Engro

For those that have used CR-S v2 on the track, what cold pressures are you using ?

Brainofjjj

26-28 depending on ambient and adjust from there. I prefer them hot around 35 but that might not be good for some, i like some wiggle. I'm on my 3rd set

GrantG

How many days have you been getting? How are laptimes compared to OEM tires? Thx!

smithsonga

what’s your best source?