Cooper Discoverer STT Pro is Copper’s most extreme all-season, mud-terrain tire. Designed to deliver exceptional off-road performance while not losing good on-road traction it also has great styling and a fairly quiet ride.
Best-suited for: Pick-ups, Trucks, Jeeps, and SUVs.
- Hybrid 3-2 tread pattern controls noise and enhances stability.
- Alternate shoulder lugs improve traction on mud and soft surfaces.
- Tread design prevents stone retention and extends tire life.
- Unique mud release dimples in tread pattern help wick-off loose soil.
- Armor Tek construction improves tire durability.
- Wide circumferential grooves drain water effectively and resist hydroplaning.
- Three-ply polyester casing improves puncture resistance.
- Twin steel belts reinforced by spirally wrapped nylon improve durability.
- Shoulder soft cleats provide grip for rock climbing, and mud scoops help move you through mud quickly
- 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||D/8PLY||
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)||3415||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)||50||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||21.0||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||8.5-11.0||The approved wheel rim width range this tire will support.|
|Measured Rim Width||11.0||The recommended wheel width as recommended by the tire manufacturer to get the best wear us performance for this tire.|
|Section Width||13.6||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||38.2||The height of the tire when fully inflated.|
|Manufacturer Part Number||90000027704||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
|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 #|
These tires ride and look great with very little road noise from an aggressive tread would definitely recommend them.
Great tire great price
Great tire minimal wear from driving on the street and they clean out well when playing off road in the mud or driving in the snow great traction.
I’ve ran Cooper tires for 18 years now on every truck I’ve owned. Great tires and Tires-easy.com made finding and purchasing them very easy.
Smooth running tires
I was surprised, no tire noise. So far I'm impressed with these tires! A+
Great tires smooth ride very aggressive Offroad good price to Cheaper I can find in town
Jon from dothan al
Great looks and grip
Work great in the snow and Mudd will buy again and get a ton of compliments
Love these tires! Probably the best I’ve bought yet . Unsurpassed traction. 20000 miles on them and still look close to new.. don’t hesitate or second guess these tires.
Lowest noise and very smooth
I just went through a set of bfg all terrains. The STT Pros ride so much better. I have had a set of Cooper tires before and was pleased but these are by far the best tire I have ever owned. Already talked 2 friends into a set
10/10 would buy from here on out
Outstanding tire cooper is one of the best tires on the market. It’s not often that you find a mud tire that wears like an all terrain. Only suggestion I have for cooper would to be to include more sipping on the tire for wet weather and winter weather traction
Good deal on tires
Really pleased with my purchase!
Best all Terrain/Mudder tires
I was using Duratracs and got good mileage out of them but these are a little heavier duty and you get even more out of them plus they look great!!
These tire are perfect
Received the tires and had them installed no problem.
Cooper tires STT pro
Best tires ever! No noise at all great price and grip. Deliver was fast
Good solid and reliable tire
I haul heavy loads often and these tires perform great on and off the road! Tread life is performing exceptionally good considering the heavy loads on hot Texas highways in the summer! Highly recommend these tires and will be purchasing another set after these wear out!
I love these tires
These tires have a really aggressive look and feel. They make my truck look like it means business with only a minimal amount of road noise. They handle well on all surfaces including highway driving and wet roads. I highly recommend them to anyone that might occasionally need to be off road.
These tires work great!
Awesome tires and fast delivery
These tires are awesome!
Great tires for a great price.
One Monday tire.
Originally i bought a full set, but had one tire that wore down to nothing in 6 months! Cooper did nothing to adjust for the bad tire. I bought 2 more to balance out the front. They are wearing normally this time. Good ride and appearance, but If you get a bad one, expect no sympathy from Cooper.
These tires are awesome
I have these tires on a 2wd Chevy Silverado And I’ve never gotten stuck in a field for my work and they look awesome and preform the best out of any mud tire I’ve bought
These tires are great. There is almost no sound interference and they are aggressive as can be. Will definately purchase again. Didn't have any trouble collecting my rebate either.
I got these tires for my first mud tires on a daily and I could not be more pleased. They aren't super loud on the highway but they can turn around and tear up some mud. They weren't the best for loose sand though but I wasn't too concerned about that. And to top it all off they look great!
Just got to try them in the snow and had no issues
Best decision ever!
This is my first time purchasing tires of these type, and I was back and forth for a long time trying to decide which ones I wanted. It ended up coming down to these, and Cooper’s discounted mud tire, the MTP. I ended up going with these and I couldn’t be happier. The biggest issue other’s have mention is the road noise, which I absolutely love. Music to my ears. At about 25mph you can start to hear the hum of the tires, but it’s more noticeable to those outside then to you inside.
Good looking tires
These tires really complement my truck. I haven’t noticed any difference in handling or the ride from all terrains I had. Cheaper than buying from a dealer.
these tires are fresh not old
I've run them all bf Goodrich , Goodyear mts, but they all have their down falls, if you want to go anywhere and make it back out then these are the tires to run , their on my 2009 H3 and they are awesome mud, snow, ice , rock climbing ,you name it their the best of the best
These tires are awesome
These tires are excellent in the mud and wet clay they clean out very well and keep you going. I will buy another set after they wear out. I have them on an F250 powerstroke diesel with a fuel tank in back and a tool box, and for the weight they are wearing slowly compared to other mud tires I’ve had on before.
Best tires ever
40k on my first set. Just bought another.
Tires are on 2014 Jeep Wrangler JKU and now have over 12k miles on them. I was concerned because I knew the more aggressive tread patterns do not hold up to highway driving which my tires would see, about 70% daily driver and 30% moderate trails. After 12k miles I only have 1mm or less of ware on the tires. These tires stick to the pavement like glue and have excellent rain performance, off road in deep mud mires and swamp I have yet to even come close to getting stuck. There is a little noise but with windows up almost undetectable. I will purchase these tires again. Second cooper tires on two vehicles first was a set of RTX on a 08 pathfinder and am just as happy with those. I will only purchase COOPER tires.
Like them so far
Got about 1k on them. So much better than the nitto terra grappler m/ts i had before. More traction on wet roads and even in my yard on wet grass they grip. Quiter than the nittos. Dont wonder like the nittos (they were down to 5/32 and still wondered) all around great tire cant wait to get more miles on them. On a 2007 f250
These tires are fantastic!
They work well in the sand and mud.
These tires are great and the company that I bought them from shipped them and in two days they were at my door. Amazing I’ll be buying another set when the time comes from them.
Great tires so far..
Descent price for a mud tire. Very aggressive minimal road noise. Handle well. Waiting for snow to really test them. Cons: Fuel mileage took a drop, they have a lot of rolling resistance.
Can't beat em..
Minimal road noise, great look. excellent grip in wet weather, great grip in sand and mud. Only had them three months so can't speak for the longevity of them but so far, super impressed..
Best tire out there
Great tires hands down. I drive over 100 miles round trip per day for work and these tires ride smooth and quiet for me have had them on for over 3 months now and they still look and ride brand new. I am running them on a full-size 4 door Chevrolet and I can’t say enough how great they are.
For 40" tires these things ride like a dream!
I love my STT Pros. I love how smooth they ride. I love how they sound. I really enjoy how they handle on trails. I love how they handled the mud pit at JeepBeach in Daytona.
Much better than I expected!
I put them on my 2000 Jeep Sahara. First of all they look great. More importantly they perform very well, much better than I expected. I have a lot of highway travel to and from work with some light to medium duty off road on the weekends. I couldn't be happier so far. I have only had them about three months and really like what I have experienced. I read previous reviews before I bought them and it seemed like other people said the road noise is minimal. I knew I would be on the Highway a lot so that was also important. They are not quiet, but definitely not an issue compared to some I had in the past. The tire/road noise is a non issue as far as I am concerned. I have no complaints so far...
these are the best tires I have ever run !
Awesome tires for an awesome price ! thanks
Best/quietest mud grips ever tried.
These tires are incredible in the rain, mud ECT...
A lot of complements Not a lot of road noise great in the mud in 2wd
Will buy again. No scam here. Same as buying from a local retailer without the installing and fees
I removed a set of nearly new BFG M/T for these. These perform ridiculously well in mud, and they hook up in the rain. I've not been able to set off the traction control, whereas the BFG would slip all the time. I imagine these will do well in the snow. Road noise not as bad as I imagined, but still pretty noisy. I'll replace these with the same when the time comes
FJ loves my Super Coopers!
I have been eyeballing these tires for about 2-3 years. When it came time to replace BF Goodrich KO2, I wanted these, then saw the Nitto Grappler and the Mickey Thompson Baja’s. Almost went with the Mickeys but then remembered all the nights I laid awake wanting these STT Pros. Turns out my FJ Cruiser loves them because unlike the KO2s, they hug the road, corners and turns even in rain. They don’t put me all over the road like the KO2s. Worth every penny!
Great tires, quick delivery
LOVE COOPER TIRES!!!
Low road noise, ultimate traction and made in the USA!!!!
I just put it on my Jeep JL and I have to say I am impressed....very aggressive tire and not that noisy on highway as expected (coming from Mickey's ATZ which is a very loud tire)...Just tried on a very difficult trail and I have no complaints ...really nice product and happy with it....
Get what you pay for!
I know you've heard the comment about "you get what you pay for"! Well it's no different with these from cooper. Been running them for 3 months now. Ride great, not loud, and grip is unbelievable. We'll worth the money
Awesome all around tire
The SST PRO's work great for everything. They ride excellent on the road..handling is good also. Off road they grip better then any tire used in last 25 years. Rarely do they break loose or dig holes like swampers do. Excellent tire!
Good price,and since I had access to tire mount and balance machines I did that work myself. Tires grip well on most surfaces, my Jeep Wrangler gets around very well.
best tired ever bought
was very hesitant to getring these mud tires , because mixed reviews in noise or too agressive . actually found out they have minimum noise and look great on my 2015 ram cummins . best tire for the money by cooper .
Fast delivery, low price