I think the change is so marginal you can't calculate it.... the speedo still reads 4 mph fast on the speed signs and the mileage sux so I don't even look..... when it's near empty I just put more gas in.... haha...

 

I'm in the market for wheels. Still doing research, I've been checking those wheels out I really like them......I have a silver cab ...I just wanna make tba best selection for my color. They really set your car off.

 

Actually the discipline of the set up is correct for this vehicle, by maintaining the correct approx 25-OD front and 25-OD rear for the 996TT you will be able to drive without any issues faced by the PSM, ABS, Speedo and not to mention the possibilities of mechanical fatigue down the road on AWD cars.

From the factory fronts 25.1 to 25.5 is a 1.6% difference
From the factory rears 25.0 to 25.2 is a .9% difference

Using these ratios you should be traveling no more than 1-MPH over the speed limit, at most if you are traveling 60-MPH your actual speed will be 60.9 AT THE MOST.

This is our job here at Wheel Dynamics to ensure our customers end up with the correct settings for the Porsche they drive. There are way too many ebay sellers who are more than eager to sell you something that will fit but won't work correctly.

Let me know if I can further assist any of you,

eli@wheeldynamics.com and yes, we ship International almost every week!

-Eli

 

Really???

According to Nitto's chart (see below) the minimum approved rim width on a 315/25 is 11"...optimum width is 11.5". OP stated he was sold a 10.5" wide wheel? If this is so, that an incorrect setting....something that will fit but not work correctly....

 

Fitting WELL over 100 Porsche cars a year we have not had any issues with this fitment. I'm sure you can find plenty of sites with information which speak against lowering Porsche cars yet almost 1/2 of the Porsche cars we fit are lowered. Experience over statements is all I'm offer, my question to you is "How will it not work correct?"

-Eli

There are quite a few shops including ours who will also sell and install forced induction kits for the natural aspirated 911, I'm sure Porsche does not condone this sort of induction on Porsche cars with such high compression but it is one of those items which is out of the normal.

 

Wow....

 

i think the criticism of the rear tire might be a little harsh.
315/25 is probably a little over tire. but its not gonna hurt. squirm will probably be minimal since its a 25 series. and the 315 over tire width might actually protect the rim lip a little bit.
the website are guidelines but are certainly not the end all be all.
i can provide many examples where over tire is fine both for street and autox purposes.
if i was sosoomi, i'd be happy. wheels and tires look good. enjoy.

 

Sosoomi is very happy!!!!

Live and let live.... enjoy and be happy...

Thanks Balefire!!

 

Thank you sir, well said...

Wheels look amazing on the car, they fit nice....

-Eli