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Discoverer® AT3 4S™

Fits SUVs/CUVs and Trucks/Pickups All-Season

Discoverer A/T3 4S™ is rated 4.5 out of 5 by 77.
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Standard Limited Warranty
Free 45-Day Test Drive
105,000 km Treadwear Protection

The Discoverer® AT3 4S™ with Adaptive-Traction Technology grips the surface, rocky or smooth, under the most severe weather, hot or cold, wet or dry.

  • On road comfort with off-road durability
  • Maximum grip and handling on wet roads
  • Stops on average over 20 feet shorter on snow*

Severe Weather Rated

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Features

Dry Performance

The tire’s ability to grip the road in dry conditions.

Wet Performance

The tire’s ability to grip the road in wet conditions.

Tread Wear

The wear rate of the tire.

Quiet Ride

The measure of how quiet a tire is while driving.

Handling

How the tire is able to respond to driving such as accelerating, braking, steering and turning.

Off Road

The tire’s ability to have grip on unpaved surfaces such as dirt, mud, sand, rock or gravel.

*When compared to other Cooper® tires.

Tire Design

  • Snow Groove Technology

    Patented saw-tooth technology traps snow in the tread to provide superior snow-on-snow traction.

  • Aqua Vac™ Channels

    Uniquely shaped, deep center grooves improve the tire's resistance to hydroplaning.

  • Secure-Grip™ All-Terrain Design

    Specially designed 5-rib all-terrain pattern provides greater off-road driving capability and improved wet/dry traction.

  • Micro-Gauge™ Zigzag Sipes

    Smaller gauge sipes in all tread blocks provide increased vehicle stability and control, while reducing stone retention and drilling. Zigzags create more biting edges for optimal wet/dry traction.

Full Specs

Tire Size Service Description UTQG Load Range Sidewall Approved Rim Width Measured Rim Width Section Width Overall Diameter Tread Width Tire Weight Max Load Tread Depth (1/32")
235/75R15 109T 620 A B XL OWL 6 - 8 6.5 9.3 28.74 6.73 34 2271 14
235/75R15 105T 620 A B STD OWL 6 - 8 6.5 9.3 28.74 6.73 31 2039 14
265/75R15 112T 620 A B STD OWL 7 - 9 7.5 10.5 30.55 7.72 39 2469 14
225/70R15 100T 620 A B STD OWL 6 - 7.5 6.5 9 27.68 6.97 31 1764 13.5
255/70R15 108T 620 A B STD OWL 6.5 - 8.5 7.5 10.3 29.09 7.95 38 2205 14
265/70R15 112T 620 A B STD OWL 7 - 9 8 10.9 29.65 8.27 39 2469 14
225/75R16 104T 620 A B STD OWL 6 - 7.5 6 8.6 29.13 6.38 30 1984 13.5
235/75R16 108T 620 A B STD OWL 6 - 8 6.5 9.3 29.72 6.73 33 2205 14
245/75R16 111T 620 A B STD OWL 6.5 - 8 7 9.6 30.31 7.05 37 2403 14
265/75R16 116T 620 A B STD OWL 7 - 9 7.5 10.5 31.57 7.72 41 2756 14
215/70R16 100T 620 A B STD OWL 5.5 - 7 6.5 8.7 27.72 6.89 31 1764 13.5
225/70R16 103T 620 A B STD OWL 6 - 7.5 6.5 9 28.66 6.97 32 1929 13.5
235/70R16 106T 620 A B STD OWL 6 - 8 7 9.4 28.82 7.4 34 2094 13.5
245/70R16 111T 620 A B XL OWL 6.5 - 8 7 9.8 29.45 7.64 36 2403 13.5
245/70R16 107T 620 A B STD OWL 6.5 - 8 7 9.8 29.45 7.64 36 2149 13.5
255/70R16 111T 620 A B STD OWL 6.5 - 8.5 7.5 10.2 30.04 7.95 38 2403 14
265/70R16 112T 620 A B STD OWL 7 - 9 8 10.8 30.39 8.27 41 2469 14
235/75R17 109T 620 A B STD OWL 6 - 8 6.5 9.3 30.75 6.85 35 2271 14
255/75R17 115T 620 A B STD OWL 6.5 - 8.5 7 10 31.97 7.44 39 2679 14
235/70R17 109T 620 A B XL OWL 6 - 8 7 9.5 30 7.44 37 2271 13.5
245/70R17 110T 620 A B STD OWL 6.5 - 8 7 9.7 30.47 7.72 37 2337 13.5
255/70R17 112T 620 A B STD OWL 6.5 - 8.5 7.5 10.2 31.18 7.91 41 2469 14
265/70R17 115T 620 A B STD OWL 7 - 9 8 10.7 31.42 8.27 43 2679 14
P285/70R17 117T 620 A B STD OWL 7.5 - 9.5 8.5 11.5 32.76 8.94 46 2833 14
215/65R17 99T 620 A B STD OWL 6 - 7.5 6.5 8.7 28.15 6.77 31 1709 13
235/65R17 108T 620 A B XL BLK 6.5 - 8.5 7 9.5 29.21 7.52 35 2205 13
245/65R17 111T 620 A B XL OWL 7 - 8.5 7 9.5 29.53 7.68 37 2403 13
255/65R17 110T 620 A B STD OWL 7 - 9 7.5 10.2 30.16 8.19 36 2337 13
265/65R17 112T 620 A B STD OWL 7.5 - 9.5 8 10.6 30.59 8.5 41 2469 13
235/60R17 102T 620 A B STD OWL 6.5 - 8.5 7 9.6 28.31 7.64 32 1874 12.5
255/70R18 113T 620 A B STD OWL 6.5 - 8.5 7.5 10.2 32.13 8.07 42 2535 14
265/70R18 116T 620 A B STD OWL 7 - 9 8 10.7 32.64 8.39 44 2756 14
265/65R18 114T 620 A B STD OWL 7.5 - 9.5 8 10.7 31.54 8.54 42 2601 13
275/65R18 116T 620 A B STD OWL 7.5 - 9.5 8 11 32.13 8.74 43 2756 13
265/60R18 110T 620 A B STD OWL 7.5 - 9.5 8 10.7 30.55 8.62 41 2337 12.5
275/60R20 115T 620 A B STD OWL 7.5 - 9.5 8 10.9 33.03 8.86 44 2679 12.5
275/55R20 117T 620 A B XL OWL 7.5 - 9.5 8.5 10.9 31.93 9.13 44 2833 12.5
255/50R20 109H 620 A B XL BLK 7 - 9 8 10.4 30.08 8.58 39 2271 12
265/50R20 111T 620 A B XL OWL 7.5 - 9.5 8.5 10.6 30.51 8.78 42 2403 12.5
285/45R22 114H 620 A B XL BLK 9 - 10.5 9.5 11.3 32.01 9.88 45 2601 12

Reviews

Rated 5 out of 5 by from These tires are a great replacement for the factory Perelli’s These tires are quiet, secure handling on dry and wet roads(haven’t driven in snow as yet). I put 275/60/20 on my pickup and they fill the wheel wells better than the factory size and the owl look good too, I have just over 7k miles on them and they still look like new, very little ware
Date published: 2020-02-12
Rated 5 out of 5 by from Great Tires I recently replaced the Good Year Wranglers on my Ram 1500 with Cooper AT3-S4 Discoverer tires. They are very quiet on the highway, and my truck handles better then it did from when it was new. But best of all these new tires perform so well on wet snowy roads. Just this week a car ran a red light while I was coming to and intersection and I had to hit the brakes real hard to prevent a collision, and I was able to stop real quick. Without these tires there would have been a collision for sure, as the good years always slid even on just wet roads. Thank you for the great tires.
Date published: 2020-02-06
Rated 3 out of 5 by from Very sad and disapointed I had the old at3s on my SUV. Loved them. So much so, I decided to get them again. Well when I picked up my car, I got sad. $1000.00 for these??? Smaller blocks Rounded off profile Looks like a street tire now. I dont like them anymore.
Date published: 2020-02-06
Rated 5 out of 5 by from Move Over Michelin I had been a Michelin fanatic since 1979. As a former tire chemist and engineer, I had had fallen in love with them. However, I recently switched to Cooper tires and love them! I wanted a more aggressive tire for my Toyota Tundra 4x4 CrewMax. I tried the Michelin LTX AT/2 tires and had them removed after 500 miles. They seemed bouncy, wobbly and out of balance. I had them balanced twice but still could not stand them. After switching to these Cooper tires I am now a Cooper convert. Also, I recently bought a preowned Suburu Forrester that came with Coopers and this conformed that it is no fluke - Cooper Tires are fantastic! Even though the Cooper Tires are great, I did had a poor experience with Tire Discounters. They gave me a hard time about switching out of the Michelin tires even though I first gave them the opportunity to re-balance them. In the end they swapped them out for the Coopers, but it was like pulling teeth. It could just be this one location - your experience may vary.
Date published: 2020-01-31
Rated 2 out of 5 by from Not good in snow For the most part it's a decent tire. Especially when towing heavy loads. But get a couple inches of snow and expect to be in 4wd and and not be able to go anywhere
Date published: 2020-01-29
Rated 5 out of 5 by from Highly recommended tires! I replaced the stock Goodyear Wrangler SRA tires that came on my 2016 Silverado with the Cooper A/T3 4S. The Goodyear tires were fine in the summer but didn't have good winter snow and ice traction. These Coopers are markedly better in the winter and nearly as quiet as the Goodyear's were. I am very pleased with these Cooper's.
Date published: 2020-01-26
Rated 1 out of 5 by from Awful Tire This is the worst tire I have owned for my 4Runner.
Date published: 2020-01-24
Rated 2 out of 5 by from Not as Rated I bought these tires based on reviews. Will finally got enough snow to test out my tires. Will I expected much more out of these tires. My last tires were BFG KO2s and they performed excellent for 2 Winters, i must say better then my new ones now. This tire may perform better with a smaller size, I'm running 275 55/20. I should of went went the Cooper M&S
Date published: 2020-01-20
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Warranty

Standard Limited Warranty
Free 45-Day Test Drive
105,000 km Treadwear Protection

Download the 2020 Consumer Replacement Tire Guide, Limited Warranty & Registration Booklet.

Reward

60 Discoverer® AT3 4S™
  • Stopping distance as compared to leading all-terrain tires, based on performance against top competitors from a leading consumer publication. Individual on-road results may vary.