Discoverer AT3 4S™

Fits SUVs/CUVs and Trucks/Pickups All-Season

Discoverer A/T3 4S™ is rated 4.9 out of 5 by 14.
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Standard Limited Warranty
Free 45-Day Road Test
105,000 km Treadwear Protection - Euro-Metric Sizes

 

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

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 29 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 33 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 42 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
265/50R20 111T 620 A B XL OWL 7.5 - 9.5 8.5 10.6 30.51 8.78 42 2403 12.5

Reviews

Rated 5 out of 5 by from Amazing I have these on my 2018 Jeep Compass and these are the best tires by far! Very capable in the snow, mud, and rain. They are quiet and a great upgrade from my OEM. I highly recommend these tires!
Date published: 2018-12-30
Rated 5 out of 5 by from Great on road & off road features. These tires replaced the original Goodyear tires on my 2015 Silverado. I noticed improved handling on the highway immediately. These tires grip wet pavement and don't break loose like the Goodyear tires. I drove on gravel, some mud and some snow the weekend after getting these tires, and so far they have performed well. The reason I did not rate the tread wear or durability because I bought these tires just a month ago.
Date published: 2018-12-14
Rated 5 out of 5 by from Great Tire Purchased 4 tires for a 2018 Volkswagen Tiguan. These are significantly better than the OEM all season tires. I have put around 600 miles on the so far and they feel solid. Road noise is very minimal, almost more quiet than the OEM tires. Rain and snow traction are both an big improvement. I am very pleased with the tire and can’t wait to take it off-road and hit the trails.
Date published: 2018-11-29
Rated 4 out of 5 by from Great Tire on my Ram But.. I have been running the at3 4s for around 10000 miles now. Great traction on wet roads, snow and offroad in the mud. They run super smooth on the highway as well. My only down fall is the grooves that are made to eliminate kicking up rocks. After going down my first dirt road I learned that to be not true. I have fender flares (thank the lord) but these tires throw EVERY rock under the tire down the side of your truck! That is my only downfall.
Date published: 2018-11-28
Rated 5 out of 5 by from So far so good. I reluctantly purchased these tires under the $70 try and ride rebate offer. I say reluctantly as I have no experience with Cooper Tires and everyone I asked did not have experience either. I replaced a set of General Grabber AT2 on my 2011 Silverado 4x4 WT with a 5.3. The first thing I noticed is how quiet and smooth the ride is compared to the old tires. Since the installation we have been on one trip over an hour away on dry pavement, had rain, freezing rain and 13 inches of wet heavy snow. The tires are performing great meeting my expectations thus far. Now to see if I can reach close to the tread life they advertise.
Date published: 2018-11-18
Rated 5 out of 5 by from A/T really means AT I did a lot of shopping around and pricing. Decided too step out on a limb to try these Discovery A/T3 4S. Could not find a good youtube review that was trustworthy either. I'm so glad I took this chance. I new it was a win when my wife said wow after driving our truck. Tire does everything I ask it to do. Wet traction is as good as dry, off road it gives you confidence to keep on going. Snow is why I'm writing this review now. I didn't even need 4wd while others struggled. Heck of a good tire, you get a premium tire at a blue collar price. Ps could be a little less Cooper Tires.
Date published: 2018-11-16
Rated 5 out of 5 by from Just put a set on an 09 4WD Ranger 4.0 Great all around tire. Pull aggressively on a dry mountain road. Hook up good on wet roads, I really like them! Look on YouTube for videos of NY218 and US 9W north of West Point area . I just ran the 9W hills as aggressively as you can without being stupid. ( I’m 52 I take my performance on the low end torque)
Date published: 2018-11-11
Rated 5 out of 5 by from Great Looking Tire Just Purchased 235/65R17 XL108T AT/3 4s --set of Tires 9/9/18--, on the drive home, Tires were Extremely Quite, Can sense the Grip on the road, will definitely need more road testing! in various weather conditions , so far Very satisfied with the look and feel while driving !! will Post another Review in a few weeks after some rain and winter weather driving.
Date published: 2018-11-09
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Videos

Warranty

Standard Limited Warranty
Free 45-Day Road Test
105,000 km Treadwear Protection - Euro-Metric Sizes


Download the 2019 Consumer Replacement Tire Guide, Limited Warranty & Registration Booklet.

Reward

  • 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.