Cooper Discoverer S/T Maxx is an all-season, all-terrain tire with commercial level traction. It is designed to perform on tough terrains with unmatched stability and responsiveness. Its unique tread pattern offers a quiet and comfortable ride. It stands up to heavy workloads, is durable and has a long tread life.
Best-suited for: Trucks, and SUVs.
- Hybrid 4-5 rib design controls noise and maintains even tire wear.
- Dual-draft, non-parallel groove walls decrease stone retention and protect from damages.
- Stone ejector ribs discharge debris and control stone retention.
- Armor-Tek3 carcass construction improves tread and sidewall performance in rugged terrain.
- Buttress tire design supports off-road grip, durability, and prevents punctures.
- Mud & Snow (M+S) rated tire.
Describes the sidewall appearance. Examples: BSW= Black Side Wall, WSW = White Side Wall OWL = Outlined White Letters.
The load index (LI) is a 2 or 3 digit number that corrolates to the maximum amount of weight the tire can carry. For example, a tire with a load index of 87 indicates that the tire can carry a maximim load of 1,201 lbs. In the case of our example the 87 identifies the tires ability to carry a maximum of 1,201 lbs. So 4 tires will carry a maximum of 4,804 lbs. Refer to your vehicle owner's manual for the recommended minimim Load Index. It is not recommended to install tires with a lower Load Index. By doing so, this could cause your tires to be overloaded thus potentially causing a blowout.
Speed Ratings (SR) are based on laboratory tests and indicates the maximum speed the tire can achieve. These tests are based on limited time trials. Higher speed rating tires typically will yield better handling capabilities, but may often result in lower mileage. Refer to your vehicle owner's manual for the recommended minimum Speed Rating. It is not recommended to install a tire with a lower speed rating as it could affect the handling of your vehicle. It is important to note that speed ratings only apply to tires that have not been damaged, altered, under-inflated or overloaded. Additionally, most tire manufacturers maintain that a tire that has been cut or punctured no longer retains the tire manufacturer's original speed rating, even after being repaired because the tire manufacturer can't control the quality of the repair.
|Load Range/Ply Rating||E/10PLY||
Ply Rating is related to the max load capacity. This value can be defined with a letter or number. The higher the number/letter, the higher the load capacity.
To help consumers evaluate their tires, the U.S. National Highway Traffic Safety Administration (NHTSA) created the Uniform Tire Quality Grading System (UTQG). The UTQG rates tires are rated on their tread-wear, traction performance, and temperature resistance. The grade for each of these can be found on the sidewall of your tire (except for winter tires and certain light truck tires). Click here for more information.
|Max Single Load(lbs)||3640||The maximum load this tire will support. Remember to multiply this number by the number of tires installed on your vehicle to get the maximum carrying capacity. This number is directly related to the Load Index.|
|Max Single Air Pressure(PSI)||80||The maximum air pressure this tire will support. This does not represent the amount of air pressure your tires should have at all times. Consult with your owner's manual to determine the best air pressure you should use for your vehicle.|
|Tread Depth||18.5||The amount of tread on the tire. Once the tire is worn to 2/32nds, it is considered fully used and should be replaced at that time. Most tires will have tire indicators in the grooves of the tire to help you determine when the tires are worn down to 2/32nds.|
Nondirectional - most common, same tread pattern on inside & outside of the tire. Can be rotated to all four corners of vehicle. Asymmetrical - tread pattern is different on the inside to the outside of the tire, and must be mounted properly. Can be rotated to all four corners of the vehicle. Directional tires - roll in only one direction, must be mounted properly. Once mounted they must remain on the same side of the vehicle, and only be rotated front to rear.
|Rim Width Range||8.0-10.0||The approved wheel rim width range this tire will support.|
|Measured Rim Width||8.5||The recommended wheel width as recommended by the tire manufacturer to get the best wear us performance for this tire.|
|Section Width||11.8||The measurement from sidewall to sidewall.|
|Tread Width||Not Available||The measurement from one side of the tread to the other side of the tread.|
|Overall Diameter||32.8||The height of the tire when fully inflated.|
|Manufacturer Part Number||90000019868||Manufacturer part number (sku)|
Shipping rates and estimated delivery times are available on tires after setting your delivery zip code. Tires ship via FedEx Ground and the shipment times are a very good estimate, although not an exact number of time-in-transit days. Tires are delivered Monday - Saturday. FedEx does not pick up orders on weekends or certain holidays. Once the tires are picked up, the time-in -transit estimate begins. If you place your order Friday afternoon, or on the weekend, your tires it will not ship until the following week. Currently we only offer FedEx Ground, expedited shipping is not available. Depending on when you place your order, there may be one, possibly two days of processing time. Shipping delivery times can be impacted by weather events across the country.
You can choose between 3 delivery options:
- 1. Your tires can be delivered directly to your billing address.
- 2. Your tires can be delivered to an alternate address. In this case, please specify the delivery address and the person authorized to receive the tires on your behalf.
- 3. The tires can be delivered directly to a Tire Installer of your choice. Please enter the address of the Tire Installer in the "Ship To" address and be sure to coordinate acceptance of your shipment from Tires-easy.com.
You will receive an e-mail confirmation of the transaction when you place your order. Please save a printed copy of your order confirmation for your records.
We accept American Express, Visa, MasterCard, Discover, PayPal, Katapult and Affirm for Tire Financing.
See General Terms and Conditions for additional Return/Refund details
Cooper Tires Late Summer 2022 Tire Reward
Set your compass on great savings with Cooper Tires!
Get $70 in rewards when you purchase a new set of 4 qualifying Cooper tires. Offer valid on purchases made between August 18 - September 5, 2022. Purchase your tires, submit your receipt to Cooper at the link below and receive your prepaid VISA card.
This is not an instant rebate. You must postmark or submit your receipt to Cooper by October 5th to be eligible for the prepaid card. To expedite your rebate process by up to 2 weeks, please complete your rebate application online.
|$70 Rebate||$70 Rebate|
|Cooper Discoverer AT3 4S||Cooper Discoverer STT Pro|
|Cooper Discoverer AT3 XLT||Cooper Discoverer ST Maxx|
|Cooper Discoverer AT3 LT||Cooper Discoverer Rugged Trekk|
Once you purchase your tires you can submit your rebate information by clicking on the link below. If you wish to mail-in the rebate form, click this link. Please take note of the date of the rebate and your offer number before submitting.
To submit your rebate, please click here.
|Size||Load Index/ Speed index||UTQG||Load Range/Ply Rating||Overall Diameter||Section Width||Rim Width Min||Rim Width Max||Rim Width Meas||Tread Depth (in)||Max Single Air Pressure (PSI)||Max Single Load (lbs)||Max Dual Air Pressure (PSI)||Max Dual Load (lbs)||MFG #|
Just a really great tire...
I have these tires on two 1-ton 4X4 Ram cab & chassis (flatbeds). They are fantastic tires. It's my understanding that Cooper classifies these as "Commercial Traction" tires. And, in that role, they are fantastic. They have the tread to get you out of most of what you'll get yourself into, but don't howl like an M/T (or wear even near as quickly). No matter what I've found myself in...sand, mud, wet pastures, silt, rutted Ranch roads and senderos, etc...these tires have handled it in stride. They also burn-up the highway miles without melting-away right before your eyes. If you find yourself wanting something with the best attributes of both an A/T and M/T, you should really take a serious look at these tires. Best thing of all? Made in the great U.S. of A.
Overall the Tires are Awesome!!
I have these on my tacoma and they ride quiet. Also these are great in the rain and really love the aggressive sidewall design.
Very happy with these tires, a little road noise, great traction
Awesome tires for my 2012 ram dually!
These are really great tires. They are tall and skinny so that you can put them on a dually truck without needing a spacer on the back duals! They look great and are very quiet!. The tires do have a bit of turn break in them but not bad. Definitely recommend. Tire easy ships fast and have the best price I found on the internet. I would buy again!!
These tires are good
Compared to the BFG I had prior theses tires are good. These tires have a slight sliding feel when going around curves. After 1000 miles it still feels like your vehicle wants to slide. Winter is coming. I’m hoping that it grips better compared to the BFGs I had. I’ll see how it turns out
On second set
These tires are great. Got two years out of my first set. Good through snow , mud , and all terrain!! I run them at 75psi. Good control while snow plowing. Not a loud tire. Just a great tire and Coopers how can I go wrong!
These tires lived up to all my expectations!
I got the exact tire I wanted for the lowest price around. I will be buying all my tires from Tires-easy.com.
Very happy with the tires.
This is my second set of Coopers. The previous set was a set of freebies I got from my brother, and they did so well in the short time I had them on my truck, I fidgeted I’d give them a try, but new. The one thing I will add, is that I had them siped prior to installing them on my truck. My trucks two main purposes, are off roaring and towing. On road, theyve been awesome. Wet traction is great, they’re wearing beautifully. Off road, they’ve been on par with previous tires I’ve run, such as the Goodyear duratrac, but are handling abuse better.
Great tires for off road/daily driving
I’ve had theses tires for about 5,000 miles. And I’d say these are the best tires I’ve ever had on my truck, hands down. The are great on the street, and awesome off road. I️ did some snow wheeling a couple of days ago and they did fantastic!!!! Will definitely stick with these tires!!!
Nice look , Quite and aggressive
Fit my F350 Dooley perfectly No need for spacers
Love these tires
Ordering was easy, shipping was fast and these tires are great.
Great all around tires!
I've had 4 sets of these over the years and they never let me down for quality, I run them on 3/4 and 1 ton trucks with no issues and highly recommend them to anyone! They handle great on and off road, with minimal noise on highways!
Works great in mud,good handling in wet weather. A little noisey on the road but not deafening Will replace them when the time comes with the same thing.
Thesr tires are very good for my application
Great tires easy depenable delivery the price. Is great
These tires are great
These tires do good for me because I am in the snow a lot and in the dirt in summer
Ride great and look awesome!
After ordering these I had them at my door in 2 days. Ive had them 4 months and they are wearing great and aren't loud like most off-road tires. I was hesitant since I've always gone with nittos but these tires have been very impressive and are much quieter than nitto trail grapplers. They have a nice aggressive look without looking overly aggressive. I don't take my truck "offroading" but the times the tires have been tested a little they have done great! I'll definitely be buying another set.