What's this? Overall score emphasizes safety-related tests, including braking, handling, and resistance to hydroplaning. Displayed scores are rounded; models are listed in order of precise overall score.
Approximate retail price:
Summary:An all terrain tire designed for pickups and SUVs and is well suited on dry and wet pavement and light duty off-road conditions. It has a 55,000 mile treadwear warranty.
The Cooper Discoverer A/T 3 is part of the tire
test program at Consumer Reports. In our lab tests, all terrain truck tire
models like the Discoverer A/T 3 are rated on multiple criteria, such as those listed below.
Dry braking is from 60 to 0 mph.
Wet braking is from 60 to 0 mph.
Handling includes how well the tires gripped in an avoidance maneuver involving a swerve into the left lane and back into the right lane; wet and dry cornering grip on our skid pad; and subjective steering feel.
About This Brand
One of the few independent tire manufacturers in the U.S. with origins going back to the early 20th Century, Cooper is among the world's top-10 tire makers. Based in Findlay, Ohio, Cooper Tires offers a full array of tires, including the Avon, Mastercraft, and Starfire brands. Cooper tires are most often sold by independent dealers, though they can be found online. In the past, Cooper has been a standout among light-truck tires.
Features & Specs - Cooper Discoverer A/T 3
Speed rating Speed rating. This letter denotes the maximum sustainable speed and is found directly after the load index. For S-speed-rated tires, it's 112 mph; for T, 118 mph. Speed ratings for other tires include Q, 99 mph; H, 130 mph; V, 149 mph; and Z, 150 mph plus. While such speeds may seem wildly impractical, tires with higher speed ratings tend to provide better handling at legal speed limits. Choose tires that have a speed rating at least as high as the one specified on your vehicle's placard.
Treadwear warranty Commonly used by tire manufacturers to market tires, the warranty describes the typical tread life of the tire. Consumers should view the warranty an indicator of tread life only. Actual mileage will vary with vehicle type, driving style, road, and weather conditions, just to name a few variables. Nearly all treadwear warranties are based on pro-rated amount based on the usable tread worn off the tire.
UTQG treadwear UTQGS, which stands for Uniform Tire Quality Grading System, is a federal government required grading system for passenger tires excluding winter tires. Key information includes Treadwear, Traction, and Temperature appearing on the sidewall of a tire. UTQG treadwear, an index developed by the government, compares a tire's tread life with that of a reference tire graded at 100. A tire with a grade of 300 is predicted to last three times as long as one graded at 100. Treadwear grades are just one indicator of tread life, but actual tire life will vary due to a number of factors including road conditions, driving habits, vehicle, and maintenance.
UTQG temperature UTQGS, which stands for Uniform Tire Quality Grading System, is a federal government required grading system for passenger tires excluding winter tires. Key information includes Treadwear, Traction, and Temperature appearing on the sidewall of a tire. UTQG temperature indicates the tire's ability to resist heat build-up under test conditions with Government grades of A, B, C, from best to worst.
UTQG traction UTQGS, which stands for Uniform Tire Quality Grading System, is a federal government required grading system for passenger tires excluding winter tires. Key information includes Treadwear, Traction, and Temperature appearing on the sidewall of a tire. UTQG traction indicates the tire's ability to stop on a wet surface with Government grades of AA, A, B, C, from best to worst.
I have about 40k miles on these AT3's and they have been great. They are a bit noisier than other tires but the wear life and handling along with the excellent price (I paid $170 per tire for LT265/65R17C). Based on the wear so far I should get another 40K miles out of these tires before I will need to replace them. I live in the county and have to travel gravel roads and muddy lanes in addition to paved roads. The tires work well in all cases. I rotate them every 5K miles and check air pressure regularly. I've run Goodyear Wrangles, Michelin, and Firestones and for the money you cannot beat Coopers for lite truck tires.
How long have you owned it:
More than six months
Yes, I would recommend this to a friend.
from Fairbanks, AK
Out Of Round
The tires developed an odd wear pattern which generated a lot of vibration and noise. I thought it was my front suspension or driveline. Rotating the tires front to back helped for a while. The tire dealer told me that the tires were out of round and that was causing the odd wear pattern, vibration, and noise. Won't buy another set since this seems to be a common issue.
How long have you owned it:
More than six months
No, I would not recommend this to a friend.
Very Good in Extreme Conditions
I roll these tires on a 50 mile commute between Laramie and Cheyenne WY on I80. This stretch runs from 5000' to 9000' and is notorious for wind, snow, ice, more wind and hail. The A/T3 is the most stable tire I have driven on this highway; previous brands have included Goodyear, Goodrich and General. the most impressive recent event was encountering a 100 meter area of deep slush on the road at about 70mph. I attribute the control offered by the A/T3 as a major factor keeping me on the road during deceleration! Dry road noise is far less that competitors offering a similar tread pattern. Overall very pleased after 6 months.