Porsche vehicles are known throughout the auto industry as one of the most highly engineered driving machines. Their engineers meticulously analyze every aspect of the vehicle's execution from weight savings and balance, all the way down to how the tires perform.
Porsche vehicles from 911 Carreras to Cayennes have tires that are specifically engineered for the vehicle through collaboration between tire manufacturers and Porsche themselves. Original Equipment Porsche tires are commonly referred to as N-Spec tires because the sidewall of the tire will be branded N0, N1, N2 or N3 and so on. The "N" is the designation for Porsche approved tires and the corresponding number identifies the version, with the higher number assigned to newer generations of the tire.
For instance, if you shop by vehicle and look at the 2011 Porsche 911 Carrera 4S Coupe, when you choose "View Original Equipment Tires" the website will display all of the tires that may have come on the vehicle as Original Equipment from Porsche. You will find on the list the Michelin Pilot Sport PS2 N2, Pirelli P Zero N2, Bridgestone Potenza RE050A N0, and Bridgestone Potenza RE050A N1.
For more information, read "Porsche N-Specification Tire Approvals."
With the snow melting in most of the country, driving enthusiasts are looking forward to a spring and summer of high performance driving fun. For those on a budget, there's a great selection of Ultra High Performance All-Season tires, including the Pirelli P Zero Nero All Season. The tire is currently ranked sixth in our Tire Survey Results.
Our extensive Real World Road Ride and test track have always separated the contenders from the pretenders. A couple years ago we tested the Pirelli against the Dunlop SP Sport Signature, Sumitomo HTR A/S P01 and Yokohama AVID ENVigor with the P Zero Nero All Season delivering the quickest and most direct-feeling steering of the group. The Yokohama AVID ENVigor and Dunlop SP Sport Signature followed, with Sumitomo's HTR A/S P01 right behind. All three options exhibited an excellent direct steering feel. Overall noise levels for all four tires were similar, with all producing some amount of tread pattern hum. The AVID ENVigor generated a small ringing tone when it encountered sharp impacts on the highway, and the HTR A/S P01 produced a little more tread noise than the rest.

On the track in dry conditions, the Pirelli P Zero Nero All Season had the quickest overall lap time with its very quick steering response and good overall grip. Dunlop's SP Sport Signature followed with plenty of cornering traction and similar predictable handling. The Yokohama and Sumitomo repeated their standings as before. In the wet, the SP Sport Signature was fastest, thanks to its responsive steering and good ultimate grip, especially under braking.
If you're in the market for new Ultra High Performance All-Season tires, read "Finding the 'Ultra' in Ultra High Performance All-Season Tires" before making your selection.