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Head-to-head Updated September 2026

Cooper Discoverer STT PRO vs Yokohama Geolandar A/T G015 — Compared (September 2026)

Our Relative Score blends 60% objective test data with 40% owner-review signal — so any two tires can be compared even if they were never tested on the same day.

Tire A Cooper

Cooper Discoverer STT PRO

All Season All Terrain and Off Road tires

Cooper Discoverer STT PRO tread pattern
Objective (60%)
–/100
No test data yet
User signal (40%)
88/100
356 owner reviews
Dry
95
Wet
91
Snow
88
Comfort
88
Noise
78
Treadwear
86
Handling
89

Prices change daily — check the retailer for your size.

VS
Yokohama Geolandar A/T G015 tread pattern
Objective (60%)
78/100
4 professional tests
User signal (40%)
82/100
56 owner reviews
Dry
88
Wet
82
Snow
69
Comfort
95
Noise
47
Treadwear
83
Handling
76

Prices change daily — check the retailer for your size.

VerdictWinner: Cooper Discoverer STT PRO — better noise, snow and handling. Pick the Yokohama Geolandar A/T G015 if comfort matters most to you.
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Category breakdown

7 categories, side by side

Each bar is the Relative Score for that category. Expand a tile to see the test results and owner ratings behind it.

Dry

Weight: Neutral
Score (0–100) Discoverer STT PRO leads by 7
A — Cooper Discoverer STT PRO
95
B — Yokohama Geolandar A/T G015
88
Why this score
SourceDiscoverer STT PROGeolandar A/T G015
Professional tests (TWG score) – 88
Tire Rack owners 87 88
Tyre Reviews owners 81 84
SimpleTire owners 94 –
America's Tire owners 96 –

Wet

Weight: Important
Score (0–100) Discoverer STT PRO leads by 9
A — Cooper Discoverer STT PRO
91
B — Yokohama Geolandar A/T G015
82
Why this score
SourceDiscoverer STT PROGeolandar A/T G015
Professional tests (TWG score) – 79
Tire Rack owners 93 82
Tyre Reviews owners 71 80
SimpleTire owners 91 –
America's Tire owners 91 –

Snow

Weight: Neutral
Score (0–100) Discoverer STT PRO leads by 19
A — Cooper Discoverer STT PRO
88
B — Yokohama Geolandar A/T G015
69
Why this score
SourceDiscoverer STT PROGeolandar A/T G015
Professional tests (TWG score) – 59
Tire Rack owners 90 90
Tyre Reviews owners 63 76
SimpleTire owners 91 –

Comfort

Weight: Neutral
Score (0–100) Geolandar A/T G015 leads by 7
A — Cooper Discoverer STT PRO
88
B — Yokohama Geolandar A/T G015
95
Why this score
SourceDiscoverer STT PROGeolandar A/T G015
Professional tests (TWG score) – 100
Tire Rack owners 81 83
Tyre Reviews owners 66 86
SimpleTire owners 89 –
America's Tire owners 88 –

Noise

Weight: Neutral
Score (0–100) Discoverer STT PRO leads by 31
A — Cooper Discoverer STT PRO
78
B — Yokohama Geolandar A/T G015
47
Why this score
SourceDiscoverer STT PROGeolandar A/T G015
Professional tests (TWG score) – 28
SimpleTire owners 79 –
America's Tire owners 78 –

Treadwear

Weight: Important
Score (0–100) Discoverer STT PRO leads by 3
A — Cooper Discoverer STT PRO
86
B — Yokohama Geolandar A/T G015
83
Why this score
SourceDiscoverer STT PROGeolandar A/T G015
Tire Rack owners 75 87
Tyre Reviews owners 90 79
SimpleTire owners 84 –
America's Tire owners 87 –

Handling

Weight: Neutral
Score (0–100) Discoverer STT PRO leads by 13
A — Cooper Discoverer STT PRO
89
B — Yokohama Geolandar A/T G015
76
Why this score
SourceDiscoverer STT PROGeolandar A/T G015
Tyre Reviews owners 70 76
America's Tire owners 90 –
DriverReviews owners – 86

Scores at a glance

Cooper Discoverer STT PRO vs Yokohama Geolandar A/T G015: scores by category (0–100)
CategoryCooper Discoverer STT PROYokohama Geolandar A/T G015
Relative Score 88 78
Dry 95 88
Wet 91 82
Snow 88 69
Comfort 88 95
Noise 78 47
Treadwear 86 83
Handling 89 76

Higher is better. The Relative Score follows your weights below; category scores do not change.

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Weight the categories that matter to you

Wet grip and treadwear start at “Important” — the two things buyers rank highest. Move the sliders and the scores update instantly.

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Recomputed
Headline score

Tire A

Tire B

From owners

Pros, cons & observations

Themes extracted from owner reviews across retailers and review sites — not the opinion of TireWheelGuide.

Tire A Cooper Discoverer STT PRO

Not enough owner reviews yet to extract themes.

Tire B Yokohama Geolandar A/T G015

The Yokohama Geolandar A/T G015 is widely regarded as a highly capable, road-oriented all-terrain tire that excels in balancing daily driving comfort with moderate off-road utility. While most users praise its longevity, wet-weather performance, and snow traction, a segment of owners reports inconsistent tread life and occasional traction issues in specific conditions like deep mud or ice.

Pros

  • Excellent on-road comfort and relatively low noise levels for an all-terrain tire
  • Strong performance in light-to-moderate off-road conditions, including gravel and dirt
  • Impressive tread longevity for many users, with several reports exceeding 40,000 miles
  • Reliable wet-weather handling and 3PMSF (Three-Peak Mountain Snowflake) winter certification
  • Aesthetic appeal with an aggressive tread pattern

Cons

  • Inconsistent tread wear reported by some users, particularly on heavier trucks
  • Performance limitations in deep mud and heavy, rutted terrain
  • Occasional reports of 'floaty' steering or lack of stability on certain vehicle platforms
  • Mixed feedback regarding wet-weather traction, with some users noting slippage under acceleration

Observations

  • Users of heavy-duty trucks (3/4 ton and 1-ton) report varying experiences, with some praising the load-carrying stability while others note faster tread wear under heavy towing.
  • Subaru owners and light SUV drivers frequently highlight the tire's ability to maintain a quiet, car-like ride compared to more aggressive mud-terrain alternatives.
  • Drivers switching from passenger-rated tires to LT (Light Truck) load-range E versions noted a significant increase in ride harshness and steering stiffness.
Community buzz

What real owners are saying

From Reddit, forums and review threads. Not part of our score

Tire A

Cooper Discoverer STT PRO

We haven't collected enough community discussion about this tire yet.

Tire B

Yokohama Geolandar A/T G015

Positive

Community members generally praise the Yokohama Geolandar A/T G015 as a comfortable, quiet, and capable all-terrain tire that excels for daily highway commuting while handling light off-road and winter conditions well. It is frequently recommended for drivers prioritizing on-road manners, fuel efficiency, and mild trail or snow capability over heavy rock crawling.

r/battlewagon ·9 upvotes ·2024-10-30

“Yokohama Geolandar A/T G015 Snow performance. I'm currently running Yokohama Geolandar A/T G015's on my 2013 Subaru XV (WIP) and I live in a semi snowy area and also work in the mountains on construction sites in Japan. My co-workers keep telling me I need dedicated studless (Winter) tires but I had zero Issue with my current tires last year. I got a little stressed out and paranoid about it today when they mentioned it again, yet they have all had slippage on snow with their dedicated tires yet I had zero. Am I over thinking things? My co-workers are asses to be honest, but anyway I've attached some photos of the sort of conditions I drove in with zero trouble, yet they had slippage coming up the hill into the jobsite.”

r/XVcrosstrek ·3 upvotes ·2019-02-13

“GEOLANDAR A/T G015 Anyone running these on 17" rims, stock or other? I have Enkei M52 rims, 17x7.5 and 45mm offset. What size fits without rubbing? 215/60R17 looks to be the closest, the only other size close is 225/65R17 which I think will be too big without a lift. I am open to other suggestions for off-road capable tires that will mainly be used on-road. K02 is out because they don't fit without rubbing, and I plan to add flaps at some point and do not want to lift the vehicle or get different rims.”

r/RangerRaptor ·3 upvotes ·2024-10-19

“Changing tires (General Grabber AT3 vs Yokohama Geolandar A/T G015) Halloo I am about to pick my RR next month from the dealer and I am thinking if it is a good idea to change tires. Here is the context: I am buying the RR because I always wanted to drive a truck and I love American cars in general (I also have Mustang s197 V8). In fact I want to switch from Wrangler Sahara, which is a great car BTW, however after 4 years and only 20.000 miles I know I miss more comfort. The rest of my family even more ;-) 95% of my trips is on reagular roads, city cruising. Sometimes some rural paths (no heavy offroading). My Wrangler came with Duelers, which I replaced with Yokohama A/T G015. The difference was night and day as far as wet and cold. Here in POLAND we have two seasons: it is either hot and wet or cold and wet. Winter in my area is pretty light, however I go to the mountains once a year. So the question is: As I do not know how General Grabber AT3 works, but I trust Yokohoma G015, is the change the tires worth it?”

r/4Runner ·2026-09-04

“Anyone here running Yokohama Geolandar A/T4 G018's? Any complaints or regrets (road noise, balancing issues, etc.), specifically in SL load? Currently have the Geolandar A/T G015's on my 4th gen and am considering the A/T4's next. All the real feedback (non-commercial reviews) I've been able find on here and other forums seem to be pretty old and mostly by people without a ton of miles on them. My use case is about 90% on road with the remaining 10% on mild to moderate trails. Not a rock crawler and never will be. The G015's in SL load have been pretty perfect but I've been thinking about changing to the A/T4's next for slightly better off road performance. Main concern (aside from weight, which is why I'm looking to stay with SL instead of C) is wet pavement safety since I drive my young kids pretty much daily. I only have a roof rack, so not too much added weight.”

Top themes
#Highway Comfort and Noise#Winter and Snow Performance#Light Off-Road Capability#Fitment and Sizing#Daily Commuting Efficiency

Based on 15 community posts

Specifications

Specs side by side

Attribute A · Cooper Discoverer STT PRO B · Yokohama Geolandar A/T G015
CategoryAll Season All Terrain and Off Road tires—
Vehicle typeSUV and 4x4—
Sizes available2341
Rim diameters16″ – 20″15″ – 22″
Tread depth18 - 22/32″11 - 18/32″
UTQG—360 - 600 A B
SidewallBlack Side Wall - Raised White LetteringBlack Side Wall - Raised Outline White Lettering
Max pressure35 - 80 psi35 - 80 psi
Final verdict

Which one should you actually buy?

Cooper

Yokohama

Winner: Cooper Discoverer STT PRO — better noise, snow and handling. Pick the Yokohama Geolandar A/T G015 if comfort matters most to you.

Pick tire A You want a quieter cabin

Cooper Discoverer STT PRO scores 78 vs 47 on noise.

Pick tire A You drive through snowy winters

Cooper Discoverer STT PRO scores 88 vs 69 on snow.

Pick tire A You enjoy sharp, responsive handling

Cooper Discoverer STT PRO scores 89 vs 76 on handling.

Pick tire A Your priority is wet-weather safety

Cooper Discoverer STT PRO scores 91 vs 82 on wet.

Tire A · Cooper Discoverer STT PRO
Tire B · Yokohama Geolandar A/T G015

How do we compare tires?

Every category score blends two independent signals. 60% comes from professional tire tests (braking distances, lap times, noise measurements) normalized against the best tire in each test and weighted toward recent tests. 40% comes from thousands of owner reviews collected from retailers and review sites. When a tire has only one of the two, we use what exists and say so.

Community buzz from Reddit and forums is shown for context only — it never changes the score.