Mud-terrain tire Mud-Terrain Updated October 2026

Cooper Discoverer STT PRO review

Name: Cooper Discoverer STT PRO
Brand: Cooper

± 7

Relative score from owner reviews only

Better than 45% of the mud-terrain tires we score.

Owners 59 · 422 reviews analysed

How scores work

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Cooper Discoverer STT PRO has a Relative Score of 63 out of 100 among mud-terrain tires. 422 owner reviews rate it 59 out of 100. 75% would buy it again.

Community sentiment Positive Read the buzz

#off-road traction#highway road noise#mud and snow performance#tread wear life#heavy truck towing

What owners say

No road-test results yet, so every score here comes from owner reviews found online.

How scores work

Relative score: 0–100. Blends road tests (60%) and owner reviews (40%) category by category, the same way on every TireWheelGuide page. With only one of the two, the missing half is estimated from it, so the score stays closer to average. It needs at least one road test or five owner reviews.
Road tests: 0–100 per score, from published tests, newer tests counting more. Each result is compared with every other tire in the same test, so a win against a strong field counts for more. The average tested tire gets 70, the best 100; with only one or two tests a tire stays nearer 70. The discipline rows show % of the best tire in that test.
Owner reviews: 0–100 from the owner reviews we found online, adjusted for how generously each site rates and scaled like the road tests: the average tested tire gets 70. With only a few reviews a tire stays near the average.

Full methodology

By owner reviews

59/100

From 422 owner reviews analysed, scaled like the road tests: the average tested tire gets 70.

Would buy again 75%

Dry

Overall dry

Wet

Overall wet

Snow & ice

Overall snow & ice

Comfort

Overall comfort

Noise

Overall noise

Treadwear

Overall treadwear

Handling

Overall handling

Own these tires? Write a review →

What owners like and dislike

Themes extracted from 422 owner reviews found online.

The Cooper Discoverer STT Pro is widely praised as an exceptionally aggressive, tough mud-terrain tire that delivers impressive off-road traction in mud, rocks, and dirt while offering surprisingly smooth and relatively quiet on-road manners. While many users report great longevity and value compared to competitors like Nitto and Toyo, a few note drawbacks such as quicker wear, balancing challenges, and compromised performance in deep sand or heavy snow.

Pros

Outstanding off-road traction in mud, rocks, and dirt
Surprisingly low road noise and smooth ride for a mud-terrain tire
Aggressive and appealing visual design with tough sidewalls
Good value and competitive pricing compared to similar tier brands

Cons

Can be difficult to balance properly, leading to vibrations for some users
Faster tread wear reported by a subset of drivers under heavy use
Reduced traction in specific conditions like deep sand or packed snow/ice
Heavy tire weight can negatively impact fuel economy (MPG)

Worth knowing

Users running heavy-duty trucks and towing substantial loads appreciated the stiff, durable load-range E sidewalls and stable hauling performance.
Jeep Wrangler and Toyota off-road enthusiasts frequently highlighted excellent performance during trail and rock-crawling applications.
Drivers running larger oversized configurations (such as 35" to 40" sizes) noted manageable road noise considering the massive tread blocks.

Cooper Discoverer STT PRO specs & sizes

Prices vary by size, so each one links out separately.

Specifications
Tread depth	18 - 22/32″
Sidewall	Black Side Wall - Raised White Lettering
Max pressure	35 - 80 psi

Size	Retailer
235/85 R16	Amazon
245/75 R16	Amazon
265/75 R16	Amazon
285/75 R16	Amazon
305/70 R16	Amazon
315/75 R16	Amazon
265/70 R17	Amazon
285/70 R17	Amazon
295/70 R17	Amazon
305/65 R17	Amazon
315/70 R17	Amazon
275/65 R18	Amazon
275/70 R18	Amazon
285/65 R18	Amazon
295/70 R18	Amazon
305/60 R18	Amazon
305/70 R18	Amazon
325/65 R18	Amazon
275/65 R20	Amazon
295/55 R20	Amazon
295/60 R20	Amazon
295/65 R20	Amazon
305/55 R20	Amazon

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What owners are saying

From Reddit, forums and review threads. Not part of the scores above.

Community members widely praise the Cooper Discoverer STT PRO for its exceptional off-road traction, towing capability, and dependable handling in mud, rain, and snow. While users note it balances well and rides comfortably for a mud-terrain tire, the most common criticisms involve pavement road noise that increases with wear and concerns regarding tread life on heavy trucks.

ford-trucks.com

“I had a set in 295/70R18. The first 50% was good all around. However they got really noisy as they wore to the point you couldn't hold a conversation in the cab. At that point they had to go.”

duramaxforum.com

“Installed the stt pro's on the 10 duramax , so far I really like the tires . Put them to the test backcountry camping (towing 5th wheel) & they were good in the mud & towing. They arent the quietest tires , but did quiet down after some miles. Comparable in noise to the trail grapplers or slightly louder, they weren't squirmy when new, unlike the trailer grapplers I had on my old dodge diesel for the 1st few hundred miles Sent from AutoGuide.com Free App”

2015-09-14

powerstroke.org

“I have used Cooper Discoverer STT Pro's in mud, rain, snow, ice, sand, etc. They have performed just fine in each. They are a bit louder on the highway, but it's not that noticable. -jokester”

2022-04-14

r/XTerra ·99 upvotes

“New shoes. Cooper Discoverer STT Pro. 285/75/16”

2023-03-31

therangerstation.com ·1 upvote

“They (Cooper Discover SST Pro's) are louder than an all season for sure but not louder than my Buckshots that I ran years ago. A friend has them on his truck, '08 Ford F250 Super Duty diesel, his only complaint is how loud they were for him since the truck drives on pavement most times except on a construction site. I have driven this truck numerous times and the Cooper SST pro's have great traction both on and off road but seem, IMO, to wear quickly on pavement, for the reasons Jim Oaks mentioned, so He will not get them for his application again.... Wish they made them in my size though. So in short I agree with Jim that these are a good tire especially for its intended application.”

2019-09-30

cumminsforum.com ·1 upvote

“I have them on my 12' 2500 with a Hemi work pickup. I have a little over 15,000 miles on them and they are holding up great. They are a little noisy on the pavement but they are a mud tread.”

2016-05-16

Sentiment breakdown

Positive54%

Mixed31%

Negative4%

Neutral12%

Top themes

#off-road traction#highway road noise#mud and snow performance#tread wear life#heavy truck towing#balancing and ride quality

From 38 threads and comments.