I am currently running another Kumho tire and I am a big fan. However, please believe me, when they say DO NOT DRIVE IN NEAR FREEZING TEMPERATURES, they mean it.

ECSTA SPT Specification Data
Metric 30/35/40/45/50/55 Series, V & W Rated UTQG: 320 AA/A

A unidirectional UHP tire that provides new tire performance in wet and dry even after the tire is more than half worn. It delivers world class technology by combining grip, handling, comfort, exceptional wear and eye appealing characteristics.

Special Features

High dispersion silica expands compound performance envelope for superior wet grip and better treadwear.
Race proven carcass design with jointless cap plies, wide steel belts, ESCOT carcass profile and high durometer apex delivers razor sharp response and extreme grip without compromising ride quality.
Three-dimensional lateral grooves optimize water evacuation in footprint.
Triple tread radius optimizes footprint shape for even pressure distribution.
Shoulder blocks tilted into direction of travel to improve grip and reduce worn noise.
Rim Protector in the lower sidewall safeguards wheel against scratches and abrasions.

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ECSTA Supra

ECSTA Supra

30/35/40/45/50/55 Series, 'H','V',Z' Speed Rated, BSW
The KUMHO ECSTA Supra 712 Directional tread was developed to meet the very highest demands of those drivers who require the absolute best in handling and traction. With its European design and styling, the ECSTA Supra delivers Ultra High Performance. Also includes RWI Technology.

UTQG: HR-360 AA/A, VR- 340 AA/A, ZR- 280 AA/A

Special Features:

Advanced Silica tread compounding for superior wet & dry traction and handling.
Large lateral and center channels provide maximum water evacuation.
Advanced directional tread design for superior acceleration, braking and cornering.
Two durable nylon cap plies give high speed stability and resistance to centrifugal forces.
Two wide steel belts provide excellent cornering power and stable footprint.
Rim Protector in the lower sidewall safeguards wheel against scratches and abrasions.

Typical Vehicle Match:
Chevrolet Corvette
Ford Mustang Cobra
Dodge Viper
Nissan 300ZX
BMW
Porsche
Audi TT
Saab
Toyota Supra

Comparable Competitor Products:
Goodyear Eagle F1
Dunlop SP Sport 9000
Cooper Cobra GTZ
Firestone Firehawk SZ50
BFGoodrich g-Force KDW