Just purchased some 19' BBS wheels (CH-R's) for the track and I want a lot more rubber in the front and back. How wide can we go? Front: 265/35/19 and rear: 325/30/19?

Car will be lowered on KW's H.A.S.

I'm thinking of getting the Michelins PSS... Pilot Sport Cups are too much tire for me to handle. I need a tire that gives me more warning before **** goes south.

Thanks!

 

I think Supreme power used those size tires on their 991. They were on custom BBS E88s though, not sure what offset they were running.

 

Thanks! Yeah, I saw that on Serge's journal, the CH-R's are wide enough to handle it, but I'm wondering if it will rub?

 

IMO if you can mount Toyo 888's (235/295) on those wheels then that's a no brainer for the track. A size 295 888 is much stickier under track conditions than a 305 or 325 MPSS (and probably much cheaper too).
I've done plenty of track days on the MPSS, the 991 PZeros, and about 6 days in the 888's so far. The 888's are the best on track by a wide margin. Don't get me wrong -- the MPSS is a lovely street tire, but for a dedicated track tire it can't hold a candle to an R-comp.
I wouldn't worry about traction "warning." The 991S is so competent that unless you make a gross error in steering input or hit a curbing in an ugly way, the car isn't losing traction.

 

im thinking about going 245/ 305

 

If you one has dedicated track wheels then why not run Hoosier A6 235/295 or even a 305 rear ? As long as you are careful in wet road conditions they can be driven to the track.

 

The reason why I'm thinking of using the MPSS is that I'd probably keep those rims and tires mounted for daily driving as well, I'm also considering the Yoko's AD08's again - love those. The 888's will be quite a handful for daily driving, especially if I get caught int he rain.

Yeah, that will fit no problems. 315's will fit fine as well as far as I can tell.

They'd be great for track only, but they might be a little too serious as well for the occasional road use.

Here is another question: The manual states that you will void your warranty if you run these dedicated tires since you are pulling more G's in the corners that can potentially starve the engine of oil. I realize that the chances are relatively slim since I won't be racing, but I was a little surprised reading this. Thoughts?

Thanks for all the feedback.

 

wouldnt 315's out back be too tall?

 

We test fitted A6 Hoosiers 315/30/19 on my 13 991 C4S with no clearance issues. Plenty of room; especially if you are running 19s and 30 series.

Not sure about 20s

 

Thanks! Yeah, I'll be running 19's.

 

Consider my mind - blown.

I thought these days were behind us.

Which page was this on?

 

Page 3

Racing Tires:

The fitting of racing tires for sporting events is not approved by Porsche. Very high cornering speeds can be achieved with racing tires. The resulting transverse acceleration values would jeopardize the adequate supply of oil to the engine. Porsche therefore refuses to accept any guarantee or liability for damage occurring as a result of non-compliance with this provision.

 

interesting. Unless of course they are Porsche N spec tires, which P recieves a royality, then were all good.

 

Probably... but no mentioning regarding that in the manual. Seems really weird to market the car as a daily driver and a track toy, but you can't put track tires on it....

 

I know my 315/30/19 A6 tires do not rub.