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Cooper Discoverer ATP II
Get confident all-terrain capability from the Cooper Discoverer ATP II 275/55R20 117H XL BSW, an exclusive all-terrain tire built for pickups and SUVs that need confident off-road traction, wet-road control, and steady highway manners. This 275/55R20 Discoverer ATP II is a popular fitment for select GMC Sierra 1500, Ram 1500, Toyota Tundra, Nissan Armada, Ford F-150, Chevrolet Silverado 1500 models, plus similar half-ton pickups, full-size SUVs, and larger-wheel adventure builds using 20-inch wheels.
Best for: half-ton and heavy-duty truck fitments that need durable shoulder traction, stability, and a composed highway feel on larger-wheel pickups and full-size SUVs, especially in a 275/55R20 size with 117H XL capability.
Why choose the Cooper Discoverer ATP II in 275/55R20?
All-terrain traction: Alternating shoulder scallops and wide off-road shoulder tread blocks help the ATP II dig into loose terrain like dirt, mud, gravel, and sand.
Wet and winter-road control: Wet Grip Grooves and Snow Claw technology help support grip on rainy pavement, slushy roads, and light winter conditions.
Durability for truck use: Stone Ejector Ledges help reduce stone retention, while rugged shoulder lugs add traction in aired-down driving and help resist damage away from pavement.
Highway stability: A solid center rib, stable tread area, interlocking sipes, and durable tread compound help deliver predictable handling and long-lasting all-terrain performance.
Comfort and warranty: Proprietary tread block sizing and spacing support a smoother, quieter ride, and the Cooper Discoverer ATP II is backed by a 60,000-mile manufacturer's treadwear warranty.
Popular vehicle fitments for 275/55R20 Cooper Discoverer ATP II
This tire size is commonly shopped for select trims or replacement applications of the GMC Sierra 1500, Ram 1500, Toyota Tundra, Nissan Armada, Ford F-150, and Chevrolet Silverado 1500. It is also a strong all-terrain option for comparable vehicles that use the same tire size, load range, speed rating, wheel diameter, and sidewall designation.
Size and rating details
275/55R20: This size is designed for 20-inch wheels and is a practical choice for full-size pickups and SUVs that need all-terrain style, wet-road control, and highway stability.
117H XL: The 117H XL service description adds extra load capacity for heavier trims, cargo, passengers, and larger-wheel truck or SUV applications.
BSW: This version uses black sidewall styling.
Speed capability: This size carries H-rated speed capability for composed highway response on larger-wheel truck and SUV applications.
| SECTION WIDTH Measures the width of the tire from sidewall to sidewall, which is mounted on a wheel and inflated. | 275 |
| ASPECT RATIO Determines the sidewall height of the tire, based on the width. | 55 |
| RIM DIAMETER Measures the rim size from top to bottom (in inches). | 20" |
| OVERALL DIAMETER Measures the tire height from top to bottom when mounted on a wheel and inflated. | 31.89" |
| RIM WIDTH RANGE The approved range of rim widths this tire can be safely mounted on. | 7.5" - 9.5" |
| WEIGHT The weight of the tire measured in pounds (weight of tire only). | 44.48 LBS |
| TREAD DEPTH Measured in /32 of an inch to determine the height of the tread block from top to bottom. | 12/32" |
| LOAD INDEX Determines the weight a tire can carry at maximum air pressure. See load Index chart. | 117 |
| LOAD RANGE Determines the ply rating of the tire. Should be replaced with the same or higher rating. | XL |
| MAX PSI The max psi is the highest pressure the tire can hold, but should be inflated to your vehicle specifications not exceeding this amount. | 50 PSI |
| SPEED RATING Designation from laboratory testing to determine the maximum speed the tire can travel. Maintain the same speed rating or higher for replacement. | Up to 130 mph |
| SIDEWALL DESC. The sidewall designation to describe the lettering on the sidewall. | Black Side Wall |
| WARRANTY Estimates the life expectancy of the tire, set by the tire manufacturer. | 60000 |
| VPN Vendor Product Number | 171318059 |
| GTIN Global Trade Item Number | 029142999041 |
Customer Reviews
They are doing quite well. I have hauled heavy and towed a large travel trailer with them, as well as driven on all types of roads and even handy dirt paths. Never felt any issues with traction or maneuverability. Very happy with them.
I would buy them again
feel like they nee to be balanced