The Cooper Discoverer STT Pro is an off-road tire with a carbon black tread compound, advanced silica content, and Armor-Tek3 protection. It delivers an astounding off-road performance that can easily navigate all sorts of beaten terrain. It also performs well on the dry tarmac and in wet and slippery conditions. However, it may have some drawbacks, such as increased road noise, decreased fuel economy, and high prices. It is an extreme tire for adventurous drivers willing to trade off some on-road comfort for off-road capabilities.
The Cooper Discoverer STT Pro is a tire designed for off-road driving. STT Pro has a durable tread compound, a protective layer, and a silica-enhanced grip. It can handle various terrains, such as mud, rocks, sand, and snow, and also has decent performance on the road but may be noisy, costly, and less fuel-efficient. It is a tire for drivers who love adventure and challenge.
The Cooper Discoverer STT Pro tires are suited for drivers who love off-road adventure and challenge. They are suitable for pickup trucks, SUVs, and Jeeps that can navigate rough terrain like mud, rocks, sand, and snow. They are not for drivers who prioritize on-road comfort, noise reduction, or fuel efficiency.
The article aims to provide an in-depth review of the tires’ performance. It aims to inform the readers about the features, benefits, and drawbacks of the Cooper Discoverer STT Pro tires. It also compares the tires with similar products in the market and gives a rating based on various criteria. The article is intended for drivers interested in off-road driving and wanting to know more about the Cooper Discoverer STT Pro tires.
Features and Design
Tread Design
The tread pattern of the Cooper Discoverer STT Pro tires is a hybrid design that combines features for both on-road and off-road performance.
It has a 3-2 inner tread rib pattern that reduces road noise and improves stability and handling. It also has large, deep voids and alternating shoulder lugs, providing excellent traction and grip on mud, sand, and rocky terrain.
The tread also has mud-release dimples, mud scoops, and scallops that help to clean out the mud and enhance the self-cleaning ability of the tire. The silica-infused rubber compound used to make the tread enhances wet and dry traction, cut and chip resistance, and braking.
Mastering Diverse Terrains
The tread design of the Cooper Discoverer STT Pro tires helps with traction in different terrains by having features that suit various road conditions. For example:
The large, deep voids and alternating shoulder lugs provide excellent traction and grip on mud, sand, and rocky terrain. They help to dig into the surface and create a firm contact patch.
The mud-release dimples, mud scoops, and scallops help to clean out the mud and enhance the self-cleaning ability of the tire. They prevent the tread from clogging and losing traction.
The silica-infused rubber compound improves braking, cut and chip resistance, and wet and dry traction. It helps lower the rolling resistance and increase the tire’s durability.
The 3-2 inner tread rib pattern reduces road noise and improves stability and handling. It helps to balance the tire performance in both on-road and off-road conditions.
Tire Construction Breakdown
The tire’s construction comprises several layers and features that enhance its durability, protection, and performance. Some of the main aspects of the tire’s construction are:
Three-ply carcass construction: The tire has three layers of polyester fabric in the tread and sidewall, which provide 50% more protection against impact damage than a standard two-ply tire12. The third ply runs at a different angle than the other two, reducing the sidewall’s weak points.
Armor Tek3 Protective Ply: This layer overlays the three-ply carcass and runs at a unique angle to maximize the carcass protection.
Rubber Rim Flange Protector: This is a raised rubber ring on the lower sidewall area that helps to protect the wheel and tire from damage while off-road.
Silica-infused compound: The tire uses a rubber compound that contains silica and carbon black, which improve the on- and off-road wet traction, braking, cut and chip resistance, and rolling resistance.
Cut and chip compound additives: The tire has additives in the rubber compound that minimize the abrasions to the tread pattern caused by rocks and debris.
Variable depth siping: The tire has sipes, or minor cuts, in the tread blocks that vary in depth, which help to reduce the stress concentrations and prevent the sipes from cutting and chipping.
On-Road Performance
Noise level
The tires are relatively quiet for a mud-terrain tire, especially at low to moderate speeds. However, they produce some noticeable roar at highway speeds, which may annoy some drivers. According to one source, the tires have a 10-decibel difference compared to the Goodyear Wrangler MT/R tires at 50 mph. Another source rated the noise level at 5.5/10, slightly better than the average of 4.8/10 for other mud-terrain tires.
Handling and stability
The tires have decent handling and stability on paved roads, thanks to the 3-2 inner tread rib pattern that reduces road noise and improves stability and handling. The tires offer firm grip and traction thanks to the silica-infused rubber compound and the variable depth siping on wet and dry surfaces. However, the tires may not be responsive or agile at high speeds or during emergency braking, as they are for off-road use. One source reported a heavy thud during hard braking, which could be dangerous in heavy traffic. Another source noted that the tires felt slightly rigid at the first 1-2 miles but settled quickly afterward.
Ride quality
The tires have a comfortable ride quality for an off-road tire, as they have a three-ply carcass construction and an Armor Tek3 protective ply that enhances puncture resistance and durability. The tires also have a rubber rim flange protector that helps to protect the wheel and tire from damage while off-road. However, the tires may still be bouncy or harsh on some road conditions, as they have a high-void, aggressive tread pattern for off-road traction. One source rated the ride quality at 5.5/10, slightly better than the average of 4.8/10 for other mud-terrain tires.
Off-Road Performance
Traction in mud, rocks, sand, and snow
Its have excellent traction and grip on dirt, rocks, sand, and snow, thanks to features such as the large, deep voids, the alternating shoulder lugs, the mud release dimples, the mud scoops, the scallops, the side biter cleats, the flex groove, the silica-infused compound, and the variable depth siping.
The tires can handle various terrains, such as gravel, dirt, mud, and stones, and provide a stable feeling even when the surface is thick and sticky. The tires also perform well on hard-packed surfaces, loose soil, and shallow sand, resisting the tendency to dig or slip.
However, the tires may be less effective on packed snow and ice, requiring siping and biting edges for such conditions.
Climbing and hill descent capabilities
The tires have impressive climbing and hill descent capabilities with features like side biter cleats, a flex groove, and a silica-infused compound that improves incline traction and lessens tire side slip.
When the tires are off-camber, they can provide lateral traction, push through the dense mud, and grip the sharp rocks. The tires also have good braking performance, thanks to the silica-infused compound and the variable depth siping that improves wet and dry traction.
Off-Road Adventures
Anecdotal experiences from off-roading with the STT Pros: Several sources have shared their positive experiences from off-roading with the STT Pros, such as:
One source tested the tires on a Jeep Wrangler JKU and found that they performed well in every situation, such as post-rain mud, rocky slopes, ice-and-snow-covered trails, etc. They also noted that the tires were quiet and comfortable on the highway and had minimal wear after 5,000 miles.
Another source tested the tires on a Toyota Tacoma and found that they delivered in every aspect, from the highway to the dirt. They praised the tires’ traction on highly steep ascents and descents, lateral traction on off-camber situations, and performance in soft sand, loose soil, and mud.
A third source tested the tires on a Ford F-150 and found them surprisingly good in soft sand, going up and down hills. They also noted that the tires were pretty quiet on the road and had a comfortable ride quality for an off-road tire.
Cooper Discoverer STT Pro Tires Rating: 4 out of 5 Stars
Off-Road Performance: 5/5
- Exceptional traction in mud, rocks, sand, and snow.
- An aggressive tread pattern provides excellent grip and biting edges.
- Good climbing and hill descent capabilities.
On-Road Performance: 3.5/5
- It’s surprisingly quiet for a mud-terrain tire at low speeds.
- Stable handling and decent ride quality on paved roads.
- Increased noise at higher speeds, especially on rough surfaces.
- Decreased fuel economy compared to all-terrain tires.
Durability and Treadwear: 4.5/5
- 3-ply sidewall resists punctures and tears.
- Silica tread compound promises long tread life.
- 50,000-mile solid treadwear warranty.
Comfort and Noise: 3/5
- It has a rougher ride than all-terrain tires, noticeable on uneven surfaces.
- Increased road noise at higher speeds can be tiring on long drives.
- It best suits those prioritizing off-road capabilities over on-road comfort and quietness.
Value: 3.5/5
- High initial cost compared to all-terrain tires.
- Excellent off-road performance justifies the price for dedicated enthusiasts.
- Consider value based on your driving habits and expected usage.
Cooper Discoverer STT Pro Advantages and Drawbacks Review
Pros
Cons
Durability and Treadwear
Expected lifespan
The expected lifespan of the tires relies on many factors, such as driving habits, road conditions, tire maintenance, and vehicle alignment. However, based on some results, the tires have a 30,000 to 50,000-mile lifespan, depending on the amount of off-road use. The tires have silica-infused compound and cut-and-chip compound additives that improve treadwear and rolling resistance. The tires also have variable depth siping that reduces the stress concentrations and prevents the sipes from cutting and chipping.
Warranty coverage
The tires lack a standard mileage warranty because their design caters to off-road use. However, they come with a 45-day satisfaction guarantee, allowing customers to exchange the tires for a different set of Cooper tires if they are unsatisfied with the performance. The tires also come with a replacement warranty covering the tires for the first 2/32″ of tread wear. If an eligible adjustable condition renders the tires unserviceable, Cooper will replace them with an equivalent new Cooper tire at no cost, including mounting and balancing.
Treadwear Insights
Several users have reported their experiences with the Cooper Discoverer STT Pro tire treadwear on online forums or reviews. Some of the user reports are:
One user tested the tires on a Jeep Wrangler JKU and found minimal wear after 5,000 miles. They also noted that the tires did not get louder after the first few thousand miles, which is typical for mud-terrain tires.
Based on some simulations, another user calculated that the tires performed well for 30,000 and 35,000 miles. They also compared the data with other reliable sources and found similar results.
A third user surveyed owners online and found that many reported significant tread life left after more than 40,000 miles. They also estimated that 50,000 miles is likely for moderate off-road use.
A fourth user released their data on the tire’s treadwear performance after 15,000 miles. They measured the tread depth at installation and the final stage, finding that the rear tread depth was lower due to a non-rotation road trip. They also reported minimal cupping or feathering.
A fifth user tested the tires on a Ford F-150 and found them surprisingly good in soft sand, going up and down hills. They also noted that the tires were pretty quiet on the road and had a comfortable ride quality for an off-road tire.
FAQ about Cooper Discoverer STT Pro Tires
These tires are available in various sizes to fit multiple cars, including trucks, SUVs, and off-road vehicles.
While they perform well in various off-road conditions, it’s advisable to use dedicated snow tires for snowy environments.
Its exceptional off-road traction, durability, and on-road comfort distinguish it from competitors in the off-road tire market.
Rotating your tires every 6000 to 8000 miles helps ensure even wear and extends the lifespan of the tires.
Yes, Cooper Tires typically offer a limited warranty on their products. Check with the retailer for specific details.
Conclusion
The Cooper Discoverer STT Pro tires are excellent for drivers who love off-road adventure and challenge. Their tread design is hybrid, combining elements for both off-road and on-road performance. It performs exceptionally well on various surfaces, including mud, rocks, sand, and snow. Additionally, their robust and protective design improves treadwear and puncture resistance. They ride comfortably for an off-road tire and have respectable handling and stability on paved roads.
However, they also have some drawbacks, such as increased road noise, decreased fuel economy, and high prices. They may not be very effective on packed snow and ice and must be more responsive or agile at high speeds or during emergency braking. They are not for drivers who prioritize on-road comfort, noise reduction, or fuel efficiency.
We recommend the Cooper Discoverer STT Pro tires for drivers who own pickup trucks, SUVs, or Jeeps who can navigate rough terrain and are willing to trade off some on-road comfort for off-road capabilities. They are suitable for drivers who enjoy exploring different landscapes, such as gravel, dirt, mud, and stones and want a tire that can handle any situation. They are unsuitable for drivers who mainly drive on the highway or live in areas with heavy snow and ice.
We hope this review has been helpful and informative for you. If you have any questions or comments, please leave them below. We would love to hear about your experiences with the Cooper Discoverer STT Pro tires. Happy driving, and thanks for reading!
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