Recommended Size 305--18 Cooper Discoverer STT Pro Truck/SUV - Mud Terrain Tires
Best value
The lowest priced tire with an easy test score® of 'Great' or better
Best deal
The lowest priced premium brand tire
Top rated
The tire with the highest easy test score®
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Compare tires at a glance using our easy test score® system. Our proprietary algorithm factors in performance, expert insights, user reviews, and Uniform Tire Quality Grading (UTQG) scores.
Four criteria factor into easy test score®
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Consumer reviews
Research based on customer reviews and buying behavior
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Treadwear
The lifespan of a tire based on wear performance
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Traction
The ability of a tire to grip to the road in wet conditions
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Expert ratings
Input from veteran tire industry experts
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- Sidewall of your current tire
- Inside frame of your driver's door
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