GrantG

This was news to me - sorry if I missed it earlier...


And more info here:
https://www.caradvice.com.au/747670/...e-gt2-rs-tyre/

Kobalt

Looks like this is going to be a good year.


Thanks Grant

Kobalt

RS available from July in Germany.

acey81

Amazing drop off after the first lap on the RS. Expensive game chasing lap times on track days! Will be interesting to see a head to head against the Michelin equivalents

GrantG

Apparently they will make them in GT3 fitment too, but only in the R (not faster RS). Hopefully, having three OEM approved tires will cause a little price competition...

krell

I understand the market these serve as an arrive-and-drive tire, but if one has the means to get another set of tires and wheels to the track in a support vehicle, then going to a full slick like the Pirelli DH or DH2 will give better performance, last longer, and actually cost about 30% less.

GrantG

I’m not sure what the risk actually is, but Porsche can theoretically cancel your warranty if running slicks (if they can show some causation between that and an engine or suspension failure). The Cup R and Goodyear RS seem comparable to Hoosiers, but OEM approved. Real slicks are faster still, I’m sure. Since I have to drive to the track, real slicks (and possibly even Hoosiers) are not going to work for me.

And since I have a Non-RS, it seems like Cup R and Goodyear RS won’t even come in my sizes

robmypro

Running slicks puts a lot of pressure on a car. That extra increase in grip gets transferred to other components, causing increased wear, which a Porsche dealer would be able to spot. There goes your warranty.

Psup4s

4 second faster is a lot. I wonder if the gap was created by the drivers comfort level with the car after few drives. Great to have more tire options and wonder how they compare to cup 2

krell

One would think if the take rate on those tires is high they'll look to expand offerings into other sizes. But $3500 large for the Cup 2R that falls off as fast as it does is a tough pill to swallow.

Are we talking bushings or something else?

SanDiegoDavid

I have tested two sets of the Cup 2 R. Great tire for 2, 20 minute sessions then a rapid drop off. Approximately 1 second slower each session thereafter. I have switched to Hoosiers on 19 inch Forgelines as they are half the price.

GrantG

Do you drive to track on those? Wondering how practical it would be to do that (some say too many punctures and sandblasting from debris they pick up).

krell

Good info, thanks for the real world data. The R is definitely a cheater tire but it doesn't seem to have the value over the long run.

maspirito

Regarding what the question is with slicks, I think the first place you would see issues would be in the wheel bearings other than that I don't think there's too many other components that would be impacted.
On my 944 LS3 swap I'm running 315 and 330 Hoosiers and I basically need to change wheelbearings once a year the rest of the components are fine.

A/S

Porsche already documented "Not to use slicks" in the 991.1 GT3, some issues related to the Rear Axle Steering. The link to the official comm is buried somewhere here in RL.

Run slicks at your own risk.