Since questions still linger, I've pulled a list of tires and their general classifications from www.tirerack.com . I associated, what I consider, the highest "sub-category" with the corresponding GT4 "Main Category"...since when we talk N3, we usually think of the stickiest of street tires. The main categorys are:
N3 - Generally considered Performance Summer-only
N2 - Generally considered Performance All-Season
N1 - Generally considered Economy All-Season
Of course there are "N3" type tires (i.e. - summer only) that aren't as good as "top of the line" summer only, but they still fall outside, and above the "All-Season" or "N2" category. I thought that this would be a good separation point, and the reasoning behind choosing the "best of" within each group for each Main Category.
With that said, here is the list and should provide a decent rule of thumb for associating real life equivalents.
Tire sub-categories:
(N3) - Max Performance Summer
You want maximum street performance and only the best will do...
Ultra High Performance Summer
You want outstanding handling and response for the street...
High Performance Summer
You need to "re-tire" your sports coupe or sedan...
Grand Touring Summer
You want performance from your tires yet comfort is important too...
(N2) - Ultra High Performance All-Season
You're willing to trade a little handling for all-season versatility...
High Performance All-Season
Your sports coupe or sedan needs to make it through occasional light snow...
Performance All-Season
You want good performance at a reasonable price...
(N1) - Grand Touring All-Season
You want performance from your tires yet comfort is important too and you need all-season capabilities...
Standard Touring All-Season
You want ride comfort and good treadwear, but performance is also important....
Passenger All-Season
All you need are just good, basic tires...
Winter
You need control, traction and confidence for driving in winter...
(S1, S2, S3) - Competition
You need D.O.T. street legal tires for autocross, Solo II and/or racetrack performance...
Examples:
N-3 Max Performance Summer:
Technologically advanced tires that combine highly developed materials with precision lightweight manufacturing techniques to provide superior dry and wet traction, handling and high speed capabilities.
BFGoodrich: g-Force T/A KD
Bridgestone: Potenza RE050, Potenza RE050A, Potenza S-03 Pole Position
Continental: ContiSportContact 2, ContiSportContact 2, Vmax
Dunlop: SP Sport 9000, SP Sport 9000 DSSTSP, Sport Maxx
* Goodyear: Eagle F1 Fiorano, Eagle F1 GS-D3, Eagle F1 Supercar
Kumho: ECSTA MX
Michelin: Pilot Sport, Pilot Sport PS2
Pirelli: PZero Nero, PZero Rosso Asimmetrico, PZero Rosso Direzionale, PZero System Asimmetrico
Toyo: Proxes T1-S
Yokohama: ADVAN Neova, AD07AVS Sport
N2 - Ultra High Performance All-Season:
These tires provide light snow traction through tread designs and compounds which remain more flexible in the cold weather to help blend all-season traction with very good handling and high speed capabilities.
AvonTech: M550 A/S
BFGoodrich: g-Force T/A KDWS
Continental: ContiExtreme Contact
Dunlop: SP Sport 4000 A/SSP, Sport 5000 Asymmetrical, SP Sport 5000 Symmetrical
Kumho: ECSTA ASX
Michelin: Pilot Sport A/S, Pilot XGT Z4
Pirelli: PZero Nero M&S
Sumitomo: HTR+YokohamaAVS dB S2
N1 Grand Touring All-Season:
These tires provide light snow traction through tread designs and compounds which remain more flexible in the cold weather to help blend all-season traction with very good handling and high speed capabilities.
Avon: Tech M550 A/S
BFGoodrich: g-Force T/A KDWS
Continental: ContiExtreme Contact
Dunlop: SP Sport 4000 A/S, SP Sport 5000 Asymmetrical, SP Sport 5000 Symmetrical
Kumho: ECSTA ASX
Michelin: Pilot Sport A/S, Pilot XGT Z4
Pirelli: PZero Nero M&S
Sumitomo: HTR+
Yokohama: AVS dB S2
In case you want to know which tire is better (links to survey results):
Max Performance Summer survey results
Ultra High Performance All-Season survey results
Grand Touring All-Season survey results
I hope this helps, or at the very least, lets people have an idea of what they are riding on in GT4 when choosing tires.
* - Interesting note, these Max Performance street tires (what we consider N3) are OEM on:
Eagle F1: McLaren F1
Eagle F1 Fiorano: Ferrari F50, Ferrari F550, Ferrari F355, Ferrari F360. The Fiorano (fi o ran o) name for the Ferrari tires is used in honor of Ferraris Fiorano proving grounds.
Eagle F1 Supercar: Chevrolet Corvette C-5 ZO6, Ford GT, Shelby Series 1
Eagle F1 Supercar EMT: Cadillac CTS-V, Chevrolet Corvette C-6
N3 - Generally considered Performance Summer-only
N2 - Generally considered Performance All-Season
N1 - Generally considered Economy All-Season
Of course there are "N3" type tires (i.e. - summer only) that aren't as good as "top of the line" summer only, but they still fall outside, and above the "All-Season" or "N2" category. I thought that this would be a good separation point, and the reasoning behind choosing the "best of" within each group for each Main Category.
With that said, here is the list and should provide a decent rule of thumb for associating real life equivalents.
Tire sub-categories:
(N3) - Max Performance Summer
You want maximum street performance and only the best will do...
Ultra High Performance Summer
You want outstanding handling and response for the street...
High Performance Summer
You need to "re-tire" your sports coupe or sedan...
Grand Touring Summer
You want performance from your tires yet comfort is important too...
(N2) - Ultra High Performance All-Season
You're willing to trade a little handling for all-season versatility...
High Performance All-Season
Your sports coupe or sedan needs to make it through occasional light snow...
Performance All-Season
You want good performance at a reasonable price...
(N1) - Grand Touring All-Season
You want performance from your tires yet comfort is important too and you need all-season capabilities...
Standard Touring All-Season
You want ride comfort and good treadwear, but performance is also important....
Passenger All-Season
All you need are just good, basic tires...
Winter
You need control, traction and confidence for driving in winter...
(S1, S2, S3) - Competition
You need D.O.T. street legal tires for autocross, Solo II and/or racetrack performance...
Examples:
N-3 Max Performance Summer:
Technologically advanced tires that combine highly developed materials with precision lightweight manufacturing techniques to provide superior dry and wet traction, handling and high speed capabilities.
BFGoodrich: g-Force T/A KD
Bridgestone: Potenza RE050, Potenza RE050A, Potenza S-03 Pole Position
Continental: ContiSportContact 2, ContiSportContact 2, Vmax
Dunlop: SP Sport 9000, SP Sport 9000 DSSTSP, Sport Maxx
* Goodyear: Eagle F1 Fiorano, Eagle F1 GS-D3, Eagle F1 Supercar
Kumho: ECSTA MX
Michelin: Pilot Sport, Pilot Sport PS2
Pirelli: PZero Nero, PZero Rosso Asimmetrico, PZero Rosso Direzionale, PZero System Asimmetrico
Toyo: Proxes T1-S
Yokohama: ADVAN Neova, AD07AVS Sport
N2 - Ultra High Performance All-Season:
These tires provide light snow traction through tread designs and compounds which remain more flexible in the cold weather to help blend all-season traction with very good handling and high speed capabilities.
AvonTech: M550 A/S
BFGoodrich: g-Force T/A KDWS
Continental: ContiExtreme Contact
Dunlop: SP Sport 4000 A/SSP, Sport 5000 Asymmetrical, SP Sport 5000 Symmetrical
Kumho: ECSTA ASX
Michelin: Pilot Sport A/S, Pilot XGT Z4
Pirelli: PZero Nero M&S
Sumitomo: HTR+YokohamaAVS dB S2
N1 Grand Touring All-Season:
These tires provide light snow traction through tread designs and compounds which remain more flexible in the cold weather to help blend all-season traction with very good handling and high speed capabilities.
Avon: Tech M550 A/S
BFGoodrich: g-Force T/A KDWS
Continental: ContiExtreme Contact
Dunlop: SP Sport 4000 A/S, SP Sport 5000 Asymmetrical, SP Sport 5000 Symmetrical
Kumho: ECSTA ASX
Michelin: Pilot Sport A/S, Pilot XGT Z4
Pirelli: PZero Nero M&S
Sumitomo: HTR+
Yokohama: AVS dB S2
In case you want to know which tire is better (links to survey results):
Max Performance Summer survey results
Ultra High Performance All-Season survey results
Grand Touring All-Season survey results
I hope this helps, or at the very least, lets people have an idea of what they are riding on in GT4 when choosing tires.
* - Interesting note, these Max Performance street tires (what we consider N3) are OEM on:
Eagle F1: McLaren F1
Eagle F1 Fiorano: Ferrari F50, Ferrari F550, Ferrari F355, Ferrari F360. The Fiorano (fi o ran o) name for the Ferrari tires is used in honor of Ferraris Fiorano proving grounds.
Eagle F1 Supercar: Chevrolet Corvette C-5 ZO6, Ford GT, Shelby Series 1
Eagle F1 Supercar EMT: Cadillac CTS-V, Chevrolet Corvette C-6