Tire Scouter
Cooper Discoverer AT3 XLT

Cooper Discoverer AT3 XLT

  • All-terrain
  • 6 sizes
  • Severe-snow rated

Best for off-road enthusiasts. Ideal for those who frequently encounter snow and rugged terrains, thanks to its 3PMSF rating and solid off-road traction.

63GoodFrom 2 of 5 specs

60k mi

Not graded

Score and specs shown for size 275/65R20. Other sizes are listed below and can differ.

Our take

The Cooper Discoverer AT3 XLT is tailored for drivers who prioritize off-road capability and durability. Its 3PMSF rating suggests it handles snow better than many all-terrain rivals, making it a solid pick for those in snowy regions. The 60,000-mile treadwear warranty is a highlight, offering above-average longevity for the category.

While it meets the average comfort benchmark, its wet grip score of 4 is a clear disadvantage, especially when compared to competitors like the Toyo Open Country A/T III and Yokohama Geolandar A/T G015, which offer better wet performance. Noise levels are average, which might not satisfy those seeking a quieter ride.

In terms of positioning, the Discoverer AT3 XLT offers a compelling package for off-road enthusiasts, but its on-road performance, particularly in wet conditions, lags behind some competitors. Those prioritizing wet grip might consider the Pirelli Scorpion Zero All Season instead.

This tire is not ideal for drivers who frequently encounter wet roads and need reliable traction in such conditions. In those cases, a tire with a higher wet grip score would be more suitable.

Pros

  • Off-road traction benefits from the 3PMSF rating, indicating solid performance in severe snow conditions.
  • Treadlife warranty of 60,000 miles exceeds the all-terrain category average of 55,717 miles, promising extended durability.
  • Comfort score matches the category average of 6, making it a reasonable choice for mixed on- and off-road use.

Cons

  • Wet grip performance is subpar, which could be a safety concern in rainy climates.
  • Wet grip score of 4 falls below the category average of 5.2, which could be a concern in rainy conditions.
  • Noise level is average at best, scoring a 5, which might be noticeable on long highway drives compared to quieter options like the Pirelli Scorpion Zero All Season.
  • Dry grip is slightly below the category average of 6.6, which may affect performance on paved roads.

Tirescouter Editorial analysis, written from manufacturer specs with AI assistance. It is not based on road tests or owner reviews. How we score

Spec facts

60,000 mi
Not graded
Not graded
Not graded
S · 112 mph
126 · 3,750 lb max
80 psi
Yes

Available sizes

Every size the Discoverer AT3 XLT comes in. Pick a size to compare other tires made in it.

Every size this tire comes in, with its load, speed and UTQG ratings
SizeShop this sizeLoad indexSpeed ratingUTQGWarrantyMax loadMax PSI
275/65R20Tire Rack126S · 112 mphNot graded60k mi3,750 lb80
275/70R18Tire Rack125S · 112 mph55060k mi3,640 lb80
285/70R17Tire Rack117T · 118 mphNot graded60k miNot listedNot listed
31/10.50R15109Q · 99 mphNot graded60k miNot listedNot listed
315/70R17Tire Rack121S · 112 mph60060k mi3,195 lb65
37/12.50R17124Q · 99 mphNot graded60k miNot listedNot listed

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Fits these vehicles

A sample of recent vehicles whose factory front size matches one of this tire's sizes.

  • 2025 Chevrolet Silverado 2500
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  • 2025 Ford F-250
  • 2025 Ford F-350
  • 2025 GMC Sierra 2500 HD

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