GT Radial 100A2013 Champiro UHP AS 255/45ZR18 99Y All-Season Performance Tire

The GT Radial Champiro UHP AS is an ultra-high-performance all-season tire engineered for drivers who demand confident grip, precise handling, and long-lasting tread life year-round. Sized at 255/45ZR18 with a 99Y service description, this tire delivers strong straight-line stability, responsive cornering, and reliable braking in both dry and wet conditions, while also maintaining grip in light snow—making it an ideal choice for performance-oriented passenger cars and coupes.

The tread design features an advanced Nanometer Silica compound that improves grip across varying temperatures and reduces rolling resistance for better fuel efficiency. Full-depth sipes maintain additional biting edges throughout the entire life of the tire—not just when new—ensuring consistent all-season traction. Four wide circumferential grooves channel water away from the contact patch to reduce hydroplaning risk and deliver confident wet-weather performance.

Key Features:

• Advanced Nanometer Silica Tread Compound – Enhances grip in dry, wet, and cold conditions while improving tread wear life and reducing rolling resistance
• Full-Depth Sipes – Provide additional biting edges for consistent all-season traction throughout the tire's service life
• Four Wide Circumferential Grooves – Evacuate water efficiently to reduce hydroplaning and improve wet-weather performance
• Solid Center Rib – Promotes straight-line stability and crisp, responsive steering feel
• Large Shoulder Blocks – Maximize contact patch at higher speeds for accurate cornering and handling
• Rim Protector – Raised bead area guards alloy and aftermarket wheels against curb and road damage
• Variable Pitch Technology – Reduces road noise for a quieter, more comfortable ride
• 45,000-Mile Tread Life Warranty – Backed by GT Radial's limited treadwear warranty for added ownership confidence

The Champiro UHP AS balances the performance demands of spirited driving with the practicality of all-season capability, earning a UTQG rating of 500 A A. It is constructed as a standard load (SL) 4-ply rated tire with a black sidewall finish.