Cooper 170311009 Discoverer AT3 XLT LT285/70R17 121S All-Terrain Light Truck Tire

The Cooper Discoverer AT3 XLT is an all-season, all-terrain light truck tire engineered for drivers who demand rugged durability on and off the road. Built with a heavy-duty Load Range E, 10-ply construction, it delivers confident performance across dirt, gravel, mud, and pavement alike.

Key Features:

• Even Wear Arc Technology – Balances contact pressure across the tread footprint to promote even wear and consistent handling throughout the tire's life
• Whisper Grooves – Integrated sound barrier walls in the tread shoulders minimize road noise for a quieter on-road ride
• Stone Ejector Ledges – Prevent stone retention in the tread grooves, protecting the tire casing and maintaining traction on gravel and rocky terrain
• Rugged Traction Shoulders – Aggressive shoulder lugs enhance off-road grip in mud, rock, and loose terrain while resisting punctures and abrasion
• Wide Circumferential Grooves with Siping – Efficiently evacuate water to resist hydroplaning and improve wet-weather handling
• Snow Groove Technology – Saw-tooth block edges improve snow-on-snow traction for added winter confidence
• Reinforced Construction (Durable Tread Technology) – Heavy-duty internal structure supports increased load capacity and extends tread life under demanding use

Sized at LT285/70R17 with a 121S service description, this tire measures 32.83 inches in overall diameter and features a 17/32-inch tread depth. It carries a maximum load of 3,195 lbs at 80 PSI and mounts on 7.5–9-inch approved rim widths. A 60,000-mile treadwear warranty underscores Cooper's confidence in long-lasting performance for trucks, pickups, and full-size SUVs.