Drbill, Stay with the stock 18", you will be happier in the long run.

 

275's are way too small drbill, even if they are 19" wheels. I've run 295's on 11x19" wheels before but the size of the rear wheels and tires that you're contemplating is way off. Remember that these cars are four-wheel drive and they have a certain allowence of ratio of front to back tires that should not be messed with. If you want to go for 19" wheels, at least go for the recommended sizes and try to experiment on your beautiful machine.

 

I have zero clue why you would upgrade a wheel setup and go w/ something that's smaller let alone the same patch as the stock setup. Makes zero sense. Obvious you are only worried about looks though, so go for it.

 

Sounds like someone is trying to sell him a set of 19" wheels for a narrow body car and trying to compensate with spacers. If they are not the proper offset, they are not meant for your car. It's one thing to use a thin spacer to set the proper wheels out a little to fill the wheel wells but using spacers to accomodate the wrong wheels is simply wrong.

 

I think it's OBVIOUS someone is trying to sell him narrow body wheels and compensating w/ spacers. And from what it sounds like, they've been doing this for a LONG time.

Doc, do yourself a favor, spend money on the proper setup. You just bought a new car, don't cheap out now.

 

i appreciate all the advice (except for Darren-LOL) and it all is relevant. Yes, no doubt that a 19 x 11 wheel with 305 tires would be as closly identical to stock as you can get.This by no way means you are doing major compromises to manueverablity/handling or tech issuesif you deviate. Are you telling me that no one puts spacers on their cars for a wheel they desire with such a width deficiency? Spacers, porsche billet and good quality, do serve a purpose, and a good one at that.
i also cannot imagine a 20mm differnce in contact patch can make such a difference. if it is 20mm/side that leaves you with less than 2 inch total in the rear of less contact patch. If the total contact patch is 22 inches than a less than 10 percent deficiency is so major, esp. if you are not tracking the car? i don't think so.
Also, AWD system can't be affected for such a minor deficiency. AWD/PSM does not respond based on width of tires but on circumference/diameter and lateral movement. If the deficiency in my circumference with the 275's is a couple of inches i would assume the AWD/PSM would not be sensitized to this especially if it picks up on a quarter revolution of the tires which during movement is alot more than 2 inches.
The point is well taken that a 19" tire with 305's would be bigger, better but don't assume the other option is unheard of and you are destroying a high performance machine.
C'mon, don't you think guys who don't sit on these forums go and purchase wheels/tires and do this all day?
My sales rep might not be selling me an item that works in the "perfect 6speed world", but don't you think he would not have a reputable company if he was selling a unworkable product for 9 yrs?

 

Bill,
the key is not who is selling what to who or what works in the ''perfect 6speed world''. the key is to make sure u get what's ''perfect'' for ur car because it deserves it. the question is why do u need to compromise things when u're the one who's spending the money? btw, watch out the PCCB u have there.

good luck with whatever u decide.

 

I'm curious as to why in 9 years he hasn't started giving the wide body cars the proper setups. Sure these work, but they "work". They aren't the proper setup. I doubt any serious performance oriented people have been buying this setup from him w/ seriously thinking about it. Sure he's probably sold a lot to the guy who is out there just looking for new wheels. If that's all you are looking for, and you also just want to save money since this is a killer deal, then by all means go for it.


You've got a reputable tuner, and another guy who sells wheels telling you you are doing something wrong. Neither of them are trying to sell you their products


Just curious to why you even came here asking this question. People have answered it and you've refused to listen, only sticking to what you knew before you made this thread.

 

Bill, I hope you didn't take my posts negatively. The only point worth even mentioning is that we are all fellow 6speeders here and it's not about the "perfect 6speed world", it's about looking out for your fellow 6speeder. Your salesman has something that he wants to sell you. This is simply information that you should have.

 

i posted the thread to get information whether the setup would work. I understand it is not the perfect setup but #1-i don't track the car and use it mostly for leisurely driving
#2- i got a killer deal on these wheels/tires and love the look of them
#3-i did not expect to get the answer it is the perfect setup, all i asked is whether it will work. The helpful responses i got only addressed how i can get a more perfect setup...i don't need perfect for my driving purposes just whether it will be OK. With the killer deal i got on these i will be ahead of the game and just wanted to make sure the setup with spacers will be adequately functional...i'm not headed to the Grand Prix in the near future,just local driving..

 

If you got a killer deal, why not sell them and get the proper setup

 

Thanks, Robert. I am not a porsche genius by any respect and appreciate all your advice, as well as all the 6speeders.
But please understand i just wanted to know whether this setup will be OK. i don't track my car and use it for leisure. I stole this wheel/tire setup and just want to know if it will be adequate for my needs. i don't give a rat's *** about a difference of 1.3/mph on my speedometer or even a little sacrifice in maneuverabilty. i just got a killer deal on these, still owning my stock wheels/tires and want to make sure i will not crash and burn with this less than desirable setup..call me the average Joe Schmo walking into the wheel store looking for nice wheels at a good price If that is an insult to anyone, esp. my buddy Darren than i'm sorry.

 

when your rolling diameter is off by a percentage it effects your speedo. when your rolling diameter is off and the rear tire rolling diameter does not work to compliment and in agreement of the front tires or vice versa.... then you will run into not only drivetrain issues within an AWD car, but handling, stability, and safety. Drriving under this condition for a prolonged period of time can catylize other issues, such as creeks, brakes, and possibly steering and suspension wear and tear. I havent exactly calculated if this is the case with your proposed scenario, but at first glance it certainly seems that way. Please don't be blinded by a "good deal"

 

If the diameter of the 295 tire is 24.96 and the 275 tire is 25.49 how can that small difference hurt the AWD, SUSPENSION, ETC?

 

AMEN