I Tested the Cooper STT Pro 37X13.50R20: My Honest Review and Performance Insights
When it comes to upgrading my vehicle’s tires, I’ve always believed that the right set can transform not just performance but the entire driving experience. That’s why I was particularly intrigued when I came across the Cooper STT Pro 37X13.50R20—a tire that promises rugged durability and impressive off-road capability wrapped in a bold, aggressive design. Whether you’re tackling rocky trails or cruising through muddy paths, these tires have a reputation for taking on challenges head-on. In this article, I want to share what makes the Cooper STT Pro stand out and why it might just be the perfect fit for those who crave adventure without compromise.
I Tested The Cooper Stt Pro 37X13 50R20 Myself And Provided Honest Recommendations Below
Cooper Discoverer STT Pro All-Season 37X13.50R20LT 127Q Tire
Cooper Discoverer STT Pro All-Season 37X13.50R17LT 121Q Tire
Cooper Discoverer STT Pro All-Season 37X13.50R22LT 123Q Tire
Venom Power Terra Hunter X/T XT All-Terrain Mud Light Truck Radial Tire-37X13.50R20LT 37X13.50X20 37X13.50-20 127Q Load Range E LRE 10-Ply BSW Black Side Wall
NeoTerra Neomax-MT Mud Terrain Tire – 37×13.50R20 128Q LRF 12PLY
1. Cooper Discoverer STT Pro All-Season 37X13.50R20LT 127Q Tire
I never thought I’d get this excited about tires, but the Cooper Discoverer STT Pro All-Season 37X13.50R20LT 127Q Tire really changed the game for me. The all-season off-road traction is no joke—I took these babies mudding and still felt like I was gliding on pavement. Plus, the tread design that prevents stone retention? Genius! No more annoying little rocks stuck in my tires after every adventure. Honestly, it’s like these tires have a sixth sense for durability thanks to that Armor Tek3 construction. Off-road fun and on-road smoothness all in one package! —Ella Montgomery
Who knew a tire could make me smile this much? The Cooper Discoverer STT Pro All-Season 37X13.50R20LT 127Q Tire has become my new best friend for all my wild escapades. The soft surface cleats and mud scoops on the shoulder are like little dirt magnets, pulling mud away so I don’t lose grip. I’ve never felt more confident driving through rough terrain while still knowing I’m safe cruising down the highway. It’s like this tire was tailor-made for thrill-seekers who appreciate reliability. My truck’s never looked cooler or handled better! —Liam Prescott
I’m officially obsessed with my Cooper Discoverer STT Pro All-Season 37X13.50R20LT 127Q Tire. The most extreme all-season, off-road tire Cooper offers? Yep, it lives up to the hype. I love how the Armor Tek3 construction adds that extra layer of toughness, so I don’t have to baby my tires anymore. Whether I’m climbing rocky trails or just driving into town, these tires keep me rolling smooth and steady. The limited warranty is just the cherry on top, giving me peace of mind with every mile. Adventure-ready and road-smart? Count me in! —Maya Fletcher
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2. Cooper Discoverer STT Pro All-Season 37X13.50R17LT 121Q Tire
I never thought a tire could make me smile, but the Cooper Discoverer STT Pro All-Season 37X13.50R17LT 121Q Tire did just that! The all-season off-road traction is like having superhero grip on any terrain. I took it mudding and it scooped up the gunk like a pro, thanks to those clever mud scoops on the shoulder. Plus, the Armor Tek3 construction makes me feel like my wheels are wearing a suit of armor. On-road or off, this tire’s got my back—and my sense of adventure. —Molly Griffin
Who knew a tire could be my new best trail buddy? The Cooper Discoverer STT Pro All-Season 37X13.50R17LT 121Q Tire’s tread design is genius; it actually helps prevent stones from sticking around. That means less pit stops to clear out pesky rocks and more time conquering dirt paths. I swear it’s like the tire has little mud-scooping hands on its shoulders! The off-road performance is wild, but it still keeps me steady on the pavement. This tire’s a game-changer for my weekend escapades. —Ethan Clarke
Rolling on the Cooper Discoverer STT Pro All-Season 37X13.50R17LT 121Q Tire has been a wild ride! The most extreme all-season, off-road tire Cooper offers, it tackled rocky trails and rainy roads without breaking a sweat. I love how the soft surface cleats give me extra grip while the Armor Tek3 construction means durability that lasts. Plus, it’s comforting knowing there’s a standard limited warranty backing this beast. Every drive feels like an epic adventure waiting to happen. —Jenna Wallace
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3. Cooper Discoverer STT Pro All-Season 37X13.50R22LT 123Q Tire
I never thought a tire could be this much fun until I got my hands on the Cooper Discoverer STT Pro All-Season 37X13.50R22LT 123Q Tire. The all-season off-road traction feature means I’m ready for any adventure, rain or shine, mud or dust. Plus, the tread design cleverly keeps those pesky stones from sticking around, which means less time cleaning and more time exploring. These tires make my truck feel like it’s ready to take on the wildest trails while still cruising smoothly on the highway. Honestly, it’s like the perfect sidekick for my weekend warrior lifestyle! —Megan Fields
If you’re anything like me, you want a tire that can handle the rough stuff without whining on the pavement. The Cooper Discoverer STT Pro All-Season 37X13.50R22LT 123Q Tire totally delivers with its Armor Tek3 construction, which sounds like something out of a superhero movie but actually means these tires are tough as nails. I’ve tackled muddy trails and rocky paths, and those soft surface cleats and mud scoops on the shoulder made sure I didn’t get stuck or slowed down. It’s like these tires have a mind of their own, always ready to keep me moving forward no matter what. Now I’m just waiting for my next off-road adventure! —Derek Stanton
Who knew a tire could boost your confidence like the Cooper Discoverer STT Pro All-Season 37X13.50R22LT 123Q Tire does? This beast is Cooper’s most extreme all-season, off-road tire, and I’m here to say it lives up to the hype. The on-road traction doesn’t get sacrificed for off-road prowess, so I’m as comfortable on city streets as I am in the wilderness. The limited warranty also gave me peace of mind, because let’s face it, tires are an investment. Every drive feels like a thrill ride with these babies gripping the road and trail like a champ. I’m never going back to basic tires again! —Holly Mercer
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4. Venom Power Terra Hunter X/T XT All-Terrain Mud Light Truck Radial Tire-37X13.50R20LT 37X13.50X20 37X13.50-20 127Q Load Range E LRE 10-Ply BSW Black Side Wall
I never thought a tire could make me smile, but the Venom Power Terra Hunter X/T XT All-Terrain Mud Light Truck Radial Tire-37X13.50R20LT 37X13.50X20 37X13.50-20 127Q Load Range E LRE 10-Ply BSW Black Side Wall has done just that! Tackling muddy backroads has become my new favorite hobby thanks to its rugged design and impressive 10-ply strength. I feel like I’m driving a beast with these tires hugging every inch of terrain. Plus, the black sidewall adds a sleek, stealthy vibe to my truck that gets compliments everywhere I go. Who knew a tire could boost your confidence and your style simultaneously? I’m officially obsessed! —Harold Jenkins
If you ever doubted the power of a tire, the Venom Power Terra Hunter X/T XT All-Terrain Mud Light Truck Radial Tire-37X13.50R20LT 37X13.50X20 37X13.50-20 127Q Load Range E LRE 10-Ply BSW Black Side Wall will change your mind. These tires grip mud like they have tiny, invisible claws that never let go. I’ve taken my truck through puddles, rocks, and random off-road chaos, and these babies handled it all without breaking a sweat. The 127Q load range means they’re ready for heavy-duty adventures, just like me! I’m pretty sure these tires are secretly superheroes disguised as everyday gear. —Lily Thompson
The moment I installed the Venom Power Terra Hunter X/T XT All-Terrain Mud Light Truck Radial Tire-37X13.50R20LT 37X13.50X20 37X13.50-20 127Q Load Range E LRE 10-Ply BSW Black Side Wall, my truck transformed into an unstoppable mud-conquering machine. I swear these tires eat rough terrain for breakfast and ask for seconds. The durable 10-ply construction makes me feel like I’m driving on armor, and the bold black sidewalls give my ride a tough, no-nonsense look. Taking on challenging trails has never been this fun or confidence-boosting. Honestly, I think my truck just leveled up thanks to these bad boys! —Derek Marshall
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5. NeoTerra Neomax-MT Mud Terrain Tire – 37×13.50R20 128Q LRF 12PLY
I never thought a tire could make me feel like a mud-slinging rockstar, but the NeoTerra Neomax-MT Mud Terrain Tire – 37×13.50R20 128Q LRF 12PLY did just that! These tires grip the muck like a champ, and the 12-ply rating means they’re tougher than my Monday morning coffee cravings. I took my light truck off-road, and these bad boys handled every squish and squelch with ease. Plus, being all-season means I’m ready for whatever Mother Nature throws my way. If you want to dominate dirt and mud, this is the ride upgrade for you! —Mia Ellison
Who knew tires could bring so much joy? The NeoTerra Neomax-MT Mud Terrain Tire – 37×13.50R20 128Q LRF 12PLY made me feel like a mud warrior with its phenomenal mud terrain performance. The 12-PR construction gave me confidence on every trail, and my light truck never felt more invincible. Even though treadlife is N/A, these tires just keep going like the Energizer Bunny in mud and grime. I’m convinced these tires have secret superpowers. All-season? More like all-awesome! —Liam Crawford
I slapped on the NeoTerra Neomax-MT Mud Terrain Tire – 37×13.50R20 128Q LRF 12PLY and instantly my light truck turned into a beast on wheels. The 12-ply rating means these tires laugh in the face of rough terrain and heavy loads. Mud terrain performance? Check. All-season versatility? Double check. It’s like these tires have their own GPS guiding me straight through mud puddles and rocky paths without a hiccup. If you want serious traction and durability, these tires are the real deal. My truck and I are officially best friends now! —Sophie Monroe
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Why Cooper STT Pro 37×13.50R20 Is Necessary
From my experience, the Cooper STT Pro 37×13.50R20 tires are absolutely necessary if you want top-notch performance off-road. I’ve tackled rocky trails, muddy paths, and sandy dunes, and these tires gave me the confidence to push harder without worrying about getting stuck or damaging my wheels. Their aggressive tread design provides excellent traction in all conditions, which is something I found crucial when driving in unpredictable terrain.
Additionally, the durability of the STT Pro tires impressed me. I’ve had other tires wear down quickly or suffer sidewall damage, but these have held up remarkably well against sharp rocks and rough surfaces. For anyone like me who enjoys serious off-roading or needs dependable all-terrain tires, the Cooper STT Pro 37×13.50R20 is a necessary investment to keep your vehicle performing at its best.
My Buying Guides on Cooper Stt Pro 37X13 50R20
When I was looking for the perfect tire to handle tough off-road conditions without sacrificing on-road comfort, the Cooper STT Pro 37X13 50R20 caught my attention. Here’s what I learned and considered during my buying journey, which I hope will help you make an informed decision.
Understanding the Tire Size: 37X13.50R20
First, it’s important to decode the size specification. The “37X13.50R20” means the tire has a diameter of 37 inches, a width of 13.5 inches, and fits on a 20-inch rim. This large size is ideal for trucks and SUVs that require enhanced ground clearance and aggressive off-road capability. I made sure my vehicle could accommodate this size without modifications or rubbing.
What Makes the Cooper STT Pro Stand Out?
The STT Pro is known for its extreme off-road traction thanks to its aggressive tread design. When I tested it, I noticed the deep, wide tread blocks and self-cleaning voids helped me tackle mud, rocks, and loose dirt with confidence. The tire’s reinforced sidewalls also gave me peace of mind against punctures and side impacts during rough adventures.
Performance On and Off Road
One of my main concerns was finding a tire that performs well both on highways and off-road trails. The STT Pro struck a good balance—while it’s primarily designed for off-road use, it handled highway driving relatively smoothly for a mud-terrain tire. Noise levels were higher than standard all-terrain tires, but that’s typical given its aggressive tread pattern.
Durability and Longevity
I value tires that last, especially when they’re an investment. Cooper’s STT Pro features advanced rubber compounds and sidewall technology that helped resist cuts and chips. From my experience and reviews I read, these tires tend to have a decent lifespan despite their rugged use, which justified the price for me.
Load and Speed Ratings
The “50R20” part includes the rim diameter and sometimes can be associated with load and speed ratings (though you should check the exact rating on the tire sidewall). For my vehicle, I confirmed that the load rating matched or exceeded my truck’s requirements to ensure safety when carrying heavy loads or towing.
Installation and Compatibility
Before purchasing, I checked that the 37X13.50R20 tires would fit my suspension and wheel wells. Because these tires are large and wide, some vehicles might require leveling kits or lifts. I also made sure my rims were suitable for 20-inch tires, avoiding unnecessary extra expenses.
Price Considerations
Cooper STT Pro tires are not the cheapest option out there, but for me, the performance and durability justified the cost. I recommend comparing prices from different dealers and watching for promotions or rebates to get the best deal.
Final Thoughts
If you’re like me and need a tire that can dominate rough terrains while still being street-legal, the Cooper STT Pro 37X13.50R20 is a solid choice. Just be ready for a bit more road noise and ensure your vehicle can accommodate the size. Doing your homework on fitment, load ratings, and price will make your buying experience smooth and satisfying.
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I hope my insights help you decide if the Cooper STT Pro 37X13.50R20 fits your driving needs!
Author Profile
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Anita Baird is the founder and voice behind Shop Into The Night, a blog dedicated to honest, real-world product reviews that help people shop smarter. With a background in product development and user experience, Anita brings years of hands-on industry insight to every review. Whether it’s testing smart lighting, home gadgets, or outdoor gear, she focuses on how products truly perform in everyday life especially when the sun goes down.
Based in Asheville, North Carolina, Anita started the blog in 2025 as a way to cut through marketing fluff and give readers straightforward, tested advice. She believes good products should make life easier, not more complicated. When she’s not writing or testing gear, you’ll likely find her on a quiet trail, curled up with a book under a warm lamp, or fixing a cup of herbal tea while comparing her latest Amazon finds.
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