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Cooper Discoverer A/T3 4S

On-Road All-Terrain All Season Winter rated

The Discoverer AT34S provides reliable performance for SUVs and light duty pick-up trucks. Featuring Adaptive-Traction Technologyâ„¢, the Discoverer AT34S is designed to grip the driving surface, whether rocky or smooth, in hot or cold weather conditions. The tire is constructed using an innovative silica-based tread compound and Cooper's Sure-Gripâ„¢ five-rib, all-terrain pattern to provide off-road driving capability and excellent wet and dry traction. Its zigzag sipes improve vehicle stability while reducing stone retention, and uniquely shaped deep center grooves reduce hydroplaning. Severe weather rated, the Discoverer AT34S has patented saw tooth technology designed to trap snow in the tread to provide superior stopping distance on snowy surfaces. The AT34S is available in 37 sizes from 15-20 inch rim diameters.

The quick answer

Owners say 79% from 11 owner reviews 82% would buy again Read the reviews
Tests say Sorry, we don't currently have any test data for the Cooper Discoverer A/T3 4S

Built from every independent test result and vetted owner review we hold for this tire - the evidence is all further down the page. Data updated September 2026.

  • 11owner reviews
  • 136,290miles driven
  • 44sizes available
Cooper Discoverer A/T3 4S 2 photos

Tire Reviews Score

Cooper Discoverer A/T3 4S

7.1/10

From owner reviews only: no measured test results yet.

  • Limited Confidence
  • 11 owner reviews

How this score is built

Better than Weight
Independent testsNo measured test results yet – 0%
Owner reviews11 owner reviews · rated 79% 38% 42%
Typical tireWhere every score starts before its own data counts – 58%
Combined 35% 7.1

A fixed curve turns the combined figure into the 0 to 10 score, so roughly the top 10% of a group score 9 or more.

Confidence

  1. Limited
  2. Medium
  3. High

Owner reviews decide 42% of this score. The other 58% is the typical starting point, and it shrinks as more reviews arrive.

Scored on owner reviews alone, a tire is High once the reviews decide 90% or more, and Medium from 70%. Anything less is Limited: expect the number to move as reviews arrive.
All Tests

Sorry, we don't currently have any magazine tire tests for the Cooper Discoverer AT3 4S

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Dimensions & Label Scores
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Size Range32 sizes available

215-285Width45-75Profile15-22Rim99-117 T-HLoad/Speed Index2022First On Market

EU LabelAcross 32 sizes - the grade depends on the size you buy.

Noise

72-75dB

3PMSF on every size

Popular sizes225/45 R17265/75 R17265/75 R16265/70 R15225/70 R15265/60 R18
Frequently Asked Questions
What do owners say about the Cooper Discoverer AT3 4S?
Across 11 owner ratings the Cooper Discoverer AT3 4S averages 79%. Owners rate Dry Grip highest at 8.6 out of 10 and Ice Grip lowest at 6.9. 5 of those reviews come from owners past 10,000 miles. 82% of owners score it 70% or better.
What is the Cooper Discoverer AT3 4S's EU tire label rating?
Across its range, the Cooper Discoverer AT3 4S most commonly carries EU label ratings of D for fuel efficiency, C for wet grip and 73 dB for noise.
How comfortable and quiet are the Cooper Discoverer AT3 4S?
Owners rate the Cooper Discoverer AT3 4S 8.4 out of 10 for comfort and noise across 11 reviews.
How well do the Cooper Discoverer AT3 4S wear, according to owners?
Owners rate the Cooper Discoverer AT3 4S 7.2 out of 10 for wear across 11 reviews. 5 of those reviews come from owners past 10,000 miles, and the typical review covers 8,600 miles.
Would owners buy the Cooper Discoverer AT3 4S again?
82% of owners say they would buy the Cooper Discoverer AT3 4S again, based on the 11 owner reviews that answered the question. 45% of them gave it the highest possible answer.
More questions about the Cooper Discoverer AT3 4S (1)
What sizes does the Cooper Discoverer AT3 4S come in?
The Cooper Discoverer AT3 4S is available in 44 sizes, ranging from 215-285/45-75 R15-22.
Owner Questions
Ask a question
Sorry, we don't currently have any questions and answers for the Cooper Discoverer AT3 4S. Why not submit a question to our tire experts using the form below!

Cooper Discoverer AT3 4S Owner Reviews

Review this tire

What owners say summarised from 10 reviews

Most drivers report the Cooper Discoverer AT3 4S delivers excellent all-condition grip (dry, wet, snow) with quiet, comfortable on-road manners and strong light-off-road capability. High-scoring reviews frequently praise durability and tread life, though one low-score review cites premature wear and another criticizes brand support/recall handling. Wet braking can diminish as the tire wears, and a few note minor fuel economy drop. Overall sentiment is positive, aligning with the tire's balanced on/off-road performance.

What owners mention most counted across 11 reviews

Tap one to read only the reviews that mention it.

Owner ratings averaged from 11 ratings

  • Owner score 79%
  • Dry Grip 86%
  • Comfort 84%
  • Snow Grip 84%
  • Wet Grip 83%
  • Handling 78%
  • Road Feedback 76%
  • Wear 72%
  • Ice Grip 69%

Featured reviews

Most helpful 84%

“I bought these tires in December 2019 for my 03 GMC Sierra and thought that they did a great job. I have never had any trouble with the grip on wet or dry ground. I have also taken them on gravel roads, offroad through...”

  • GMC Sierra 1500 SLT
  • 60 miles
Read full review → 873 found this helpful
Most critical 10%

“Had these fitted to my Nissan Pathfinder where my usage is 90% on road & 10% off. My on road is quite sedate as I stopped being a boy racer years ago. Nitrogen filled and rotated as per Coopers requirement every 8000kms...”

  • Nissan Pathfinder
  • 45,000 miles
Read full review → 954 found this helpful
Longest term 52%

“Tires are poor quality and the company behind them is inadequate in Europe. Cooper has a recall on these tires. I have had to get them repaired before. I would be entitled to a recall. At first I was told I could...”

  • Toyota Landcruiser
  • 35,000 miles
Read full review → 887 found this helpful

All 11 Cooper Discoverer AT3 4S reviews

Score spread across 11 written reviews
89%
Karel Horcik
Initial Impressions

Not an offroad tire, STILL manages to take me quite far on our logging routes and forest paths. I am working as a lumberjack and I was looking for a follow up tire after my bfg a/t ko2 with better wet road handling.
I have effectively exchanged solid offroad performance for much less scary on road performance, especially in wet weather.
It looses off road in deep mud or in deep sand. But in other offroad conditions it managed similar performance to my KO2
On road is far superior to KO2, especially in wet, cold or icy conditions.
Noise level superior to KO2
tread wear adequate.
Not a single puncture or defect so far. Working with heavy trailers as well.

Would highly recommend to all people using KO2. This KO2 tire scares me shirtless in rain on asphalt.

I already bought second set for my wife's car.

This owner's scores
  • Dry Grip 10
  • Wet Grip 10
  • Road Feedback 8
  • Handling 8
  • Wear 10
  • Comfort 10
  • Buy again 10
  • Snow Grip 7
  • Ice Grip 7
Helpful 9
79%
Member
General overview:
Good for on road driving, logging road mains/light off-roading & construction sites. Good fuel economy & comfort/ handling. Wore not to my liking most likely due to more intense off road driving.


New on road:
Very good in dry conditions.
Quite good in snow and wet.
Handling is solid and ride is decently comfortable as it is an SL not an E rated tire.
Pretty good fuel economy, it is 41lbs so not heavy.


Worn in on road:
Very good in dry conditions.
Still quite good in snow, and wet grip, but wet braking performance has diminished more than I would like.
Handling still feels very good.
Fuel economy still good.
Tires wore poorly most likely due to my more intense off roading. Tread lugs starting to chip and round but are still very durable, no punctures.


Offroad overview:
They do preform very well off road in loose steep climbs and fresh packed snow climbs when airing down. I am quite surprised as the tread pattern does not look very aggressive.
Very durable even being an SL rated tire. Never had a puncture even while going off road with sharper rocks with airing down a little.

Overall quite happy with them and would buy again if I did not do as intense of off roading as I do now. But they are not the tires for me anymore.
Cooper Discoverer AT3 4S owner photo Cooper Discoverer AT3 4S owner photo Cooper Discoverer AT3 4S owner photo Cooper Discoverer AT3 4S owner photo Cooper Discoverer AT3 4S owner photo
This owner's scores
  • Dry Grip 10
  • Wet Grip 7
  • Road Feedback 9
  • Handling 9
  • Wear 7
  • Comfort 9
  • Buy again 7
  • Snow Grip 9
  • Ice Grip 4
Helpful 257
84%
Member
I bought these tires in December 2019 for my 03 GMC Sierra and thought that they did a great job. I have never had any trouble with the grip on wet or dry ground. I have also taken them on gravel roads, offroad through woods and pastures. I have never gotten stuck or had a problem with them anywhere. I was actually going to get a new pair of these tires because I liked them so much but Cooper has come out with the Discoverer Road and Trail AT tire that is supposed to be the updated version of this tire so I am purchasing that one instead. The tires lasted for just over 60,000 miles and I probably could have gotten a few thousand more miles out of them if I had rotated them a little more frequently.

Overall I am very happy with this tire and would have purchased again.
This owner's scores
  • Dry Grip 10
  • Wet Grip 9
  • Road Feedback 8
  • Handling 8
  • Wear 7
  • Comfort 9
  • Buy again 10
  • Snow Grip 8
  • Ice Grip 7
Helpful 873

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697 reviews submitted this month Earn your Contributor badge No account needed
52%
Member
Tires are poor quality and the company behind them is inadequate in Europe. Cooper has a recall on these tires. I have had to get them repaired before. I would be entitled to a recall. At first I was told I could replace the tires. After that I never heard from them again. They don't respond to emails. Never again Cooper.
This owner's scores
  • Dry Grip 6
  • Wet Grip 7
  • Road Feedback 7
  • Handling 5
  • Wear 2
  • Comfort 6
  • Buy again 1
  • Snow Grip 7
  • Ice Grip 6
Helpful 887
80%
Member
  • Ford F 150
  • 235/35 R16
  • 1,500 miles
  • A Combination of Roads
  • Average
Use many off-road. Exceptional grip in sand. Several friends have Cooper tires on heavier vehicles. They recommend Cooper tires to me because of all around performance. So far very satisfied.
This owner's scores
  • Dry Grip 7
  • Wet Grip 7
  • Road Feedback 9
  • Handling 8
  • Comfort 8
  • Buy again 9
Helpful 944
10%
Member
Had these fitted to my Nissan Pathfinder where my usage is 90% on road & 10% off. My on road is quite sedate as I stopped being a boy racer years ago. Nitrogen filled and rotated as per Coopers requirement every 8000kms to maintain their 100,000kms mileage guarantee. One of them shredded at 15,000kms having never been off road. After a bit of heated discussion with Cooper South Africa who were only going to contribute 85% of the cost, they eventually contributed the full 100%. I've just had to replace all four after only 45,0000kms as they were down to the tread wear bars. ~ not even HALF of the claimed mileage. The guarantee isn't worth the paper it's written on and quite were Cooper pluck this mileage figure from is beyond me. Would I buy them again? Certainly not. Can I recommend them? No.
89%
Member
  • Ford F 150
  • 265/75 R17
  • 1,000 miles
  • A Combination of Roads
  • Average
I have had Coopers before, with great results. So far, these are exceeding my expectations. They are quiet on the road, and give me a feeling of confidence as I use them. Great price for the value you get.
This owner's scores
  • Dry Grip 9
  • Wet Grip 9
  • Road Feedback 8
  • Handling 9
  • Wear 8
  • Comfort 8
  • Buy again 10
  • Snow Grip 10
  • Ice Grip 9
Helpful 825
74%
Member
I bought theese tires especially for snow after a long research. I was not disapointed as they behave like a winter tire bought in the snow and ice. I can't say much regarding wear as I only driven them 10k - there's hardly any wear visible by now. In the dry: it's an AT tire on a Merc X Class, they grip well on and off road. Road noise it's not bad, just not as good as a summer tire. Overall I am very satisfied with the performance in winter conditions, comparing with Goodyear Wrangler Duratrac.
This owner's scores
  • Dry Grip 7
  • Wet Grip 8
  • Road Feedback 5
  • Handling 6
  • Wear 8
  • Comfort 8
  • Buy again 8
  • Snow Grip 9
  • Ice Grip 8
Helpful 799
81%
Member
  • Ford Ranger
  • 265/60 R18
  • 16,500 miles
  • Mostly Country Roads
  • Average
I had these fitted very soon after getting my truck as the original Continentals had very little traction on the rear wheels on wet roads and mud. The Coopers have been excellent tires. Handling isn't as good as with the original Continental tires, but that's expected as the Coopers are all terrain tires with a much more chunky tread. This doesn't bother me as I drive a truck, not a sports car! Performance on both dry and wet roads is excellent. Performance off road is also superb and they really do allow the truck to go anywhere. Tire wear is very good. I've done 16,000 miles on them and they've hardly worn at all.
This owner's scores
  • Dry Grip 9
  • Wet Grip 9
  • Road Feedback 7
  • Handling 7
  • Wear 10
  • Comfort 8
  • Buy again 9
  • Snow Grip 7
  • Ice Grip 7
Helpful 957
93%
Member
Mounted these on my All New (2020) Jimny and it exceeded my expectations! Grip is excellent both in dry and wet conditions. Road noise is almost non existent (same if not better than the stock Dunlop Grantrek AT20) and there seems to be no negative impact on my fuel economy despite being wider and bigger (although I am a light footed driver). I get better handling on this especially when cornering primarily because it is much wider than the stock 195/80/r15 Dunlop's. I will surely buy these tires again in the future! I only clocked in about 2000 kms on this so it is still not showing any visible signs of wear.
This owner's scores
  • Dry Grip 9
  • Wet Grip 9
  • Road Feedback 9
  • Handling 10
  • Wear 9
  • Comfort 9
  • Buy again 10
Helpful 947
88%
Member
I bought these on promotion for about 1/3 less than they go for now.
Pros:
A handsome tire with good grip in all conditions. Unphased by heavy rain on the highway. Particularly amazing grip in deep snow in 4H or 4L. With 8" snow I was comfortably smashing up steep hills, stopping controlled and quickly, and VERY predictably 4 wheel drifting in the snow. Very good at expelling mud or snow from getting packed in the tread. Noise from tire is hardly noticeable compared to other tires in the category. Capable on and off road with an amazing 65,000 mile warranty.

Cons:
MPG noticably decreased; my average mpg fell from ~18.5 to ~17 mpg in the past year. The tires squeal on concrete roads in wet conditions before they have warmed up. Pebbles stay wedged in between the tread and make clicking noises until the noise stops on the highway and some poor sod behind you got a rock chip. Tire feedback feels numb, but that blame can be shared with my 20 yr old suspension on a 4500# Nissan dinosaur. Also, the price skyrocketed after the positive reviews rolled in.

TL;DR These are class leading tires that punch above their, and their manufacturer's weight. Cooper marketing was spot on for the SUV driver that mostly keeps to the highway, but needs uncompromising off-road performance when duty calls. At the current $156/ea USD price online, I'd shop around or wait for a rebate. When first released I got the price down to ~$100/ea USD with a rebate.
This owner's scores
  • Dry Grip 9
  • Wet Grip 8
  • Road Feedback 6
  • Handling 8
  • Wear 10
  • Comfort 9
  • Buy again 10
  • Snow Grip 10
Helpful 909
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