Have Questions? 888-421-8473 Now Shipping to Canada!
Home > Tires > Cooper Tires > Discoverer S/T Maxx

Discoverer S/T Maxx

The Discoverer S/T Maxx by Cooper is a serious off road tire with gentle on road behavior. Featuring Cooper's 3-ply Armor-Tek3 carcass, The ST Maxx can handle the toughest terrains out there, while delivering a quiet, stable on road experience. Studdable for enhanced winter traction.
Cooper Discoverer S/T Maxx - Main
Cooper Discoverer S/T Maxx - Angle
Cooper Discoverer S/T Maxx - Tread
Cooper Discoverer S/T Maxx - Sidewall
Tire Size UTQG Rating Service Description Load/Ply Rating Mileage Warranty Sidewall Per Tire Best Price Guarantee Add To Cart
LT215/85R16 - 115R E-10 Ply N/A Black Wall $ 157.00 lowest-price-button_tn Call
LT225/75R16 - 115Q E-10 Ply N/A Black Wall $ 158.00 lowest-price-button_tn Add
LT235/80R17 - 120Q E-10 Ply N/A Black Wall $ 186.00 lowest-price-button_tn Add
LT235/85R16 - 120Q E-10 Ply N/A Black Wall $ 157.00 lowest-price-button_tn Add
LT245/70R17 - 119Q E-10 Ply N/A Black Wall $ 188.00 lowest-price-button_tn Add
LT245/75R16 - 120Q E-10 Ply N/A Black Wall $ 164.00 lowest-price-button_tn Add
LT245/75R17 - 121Q E-10 Ply N/A Black Wall $ 193.00 lowest-price-button_tn Add
LT255/75R17 - 111Q C-6 Ply N/A Black Wall $ 176.00 lowest-price-button_tn Add
LT255/80R17 - 121Q E-10 Ply N/A Black Wall $ 180.00 lowest-price-button_tn Add
LT255/85R16 - 123Q E-10 Ply N/A Black Wall $ 198.00 lowest-price-button_tn Call
LT265/65R17 - 120Q E-10 Ply N/A Black Wall $ 204.00 lowest-price-button_tn Call
LT265/70R17 - 121Q E-10 Ply N/A White Letters $ 207.00 lowest-price-button_tn Add
LT265/75R16 - 123Q E-10 Ply N/A White Letters $ 180.00 lowest-price-button_tn Add
LT275/65R18 - 123Q E-10 Ply N/A Black Wall $ 255.00 lowest-price-button_tn Add
LT275/65R20 - 126Q E-10 Ply N/A Black Wall $ 281.36 lowest-price-button_tn Call
LT275/70R17 - 121Q E-10 Ply N/A Black Wall $ 214.00 lowest-price-button_tn Call
LT275/70R18 - 125Q E-10 Ply N/A Black Wall $ 231.32 lowest-price-button_tn Add
LT285/65R18 - 125Q E-10 Ply N/A Black Wall $ 269.32 lowest-price-button_tn Call
LT285/70R17 - 121Q E-10 Ply N/A White Letters $ 238.00 lowest-price-button_tn Add
LT285/75R16 - 126Q E-10 Ply N/A White Letters $ 206.00 lowest-price-button_tn Add
LT295/70R17 - 121Q E-10 Ply N/A Black Wall $ 229.00 lowest-price-button_tn Add
LT295/70R18 - 129Q E-10 Ply N/A Black Wall $ 238.48 lowest-price-button_tn Call
LT305/55R20 - 121Q E-10 Ply N/A Black Wall $ 295.00 lowest-price-button_tn Add
LT305/60R18 - 121Q E-10 Ply N/A Black Wall $ 277.00 lowest-price-button_tn Call
LT305/65R17 - 121Q E-10 Ply N/A Black Wall $ 249.00 lowest-price-button_tn Call
LT305/70R16 - 124Q E-10 Ply N/A Black Wall $ 221.19 lowest-price-button_tn Call
LT305/70R18 - 126Q E-10 Ply N/A Black Wall $ 262.36 lowest-price-button_tn Call
31-1050R15LT - 109Q C-6 Ply N/A Black Wall $ 152.00 lowest-price-button_tn Call
LT315/70R17 - 121Q D-8 Ply N/A Black Wall $ 262.00 lowest-price-button_tn Add
LT315/75R16 - 127Q E-10 Ply N/A Black Wall $ 235.40 lowest-price-button_tn Add
33-1250R15LT - 108Q C-6 Ply N/A Black Wall $ 190.00 lowest-price-button_tn Add
35-1250R15LT - 113Q C-6 Ply N/A Black Wall $ 193.00 lowest-price-button_tn Call
35-1250R20LT - 121Q E-10 Ply N/A Black Wall $ 284.00 lowest-price-button_tn Add
37-1250R17LT - 124P D-8 Ply N/A Black Wall $ 289.19 lowest-price-button_tn Add

The Cooper S/T Maxx is built to take your light truck or SUV through any terrain you can tackle, and then deliver excellent road manners on your ride home.

  • Armor-Tek3 Carcass Construction: Cooper's tough as nails, industry-leading 3-ply Armor-Tek construction delivers exceptional durability by adding strength to the sidewall and tread area. Unique angled ply construction absorbs and controls impact forces that can damage a tire in tough off-road conditions.
  • Blended Natural Rubber and Silica Compounding: Specially blended tread compounds provide exceptional wet traction and handling on the highway, while also providing a highly cut and chip resistant tread in dirt, gravel and rocky terrains.
  • Stone Ejector Ribs: CAD designed ribs within the lateral grooves of the tread discharge stones and rocks, helping to resist stone drilling.
  • Enhanced Buttress Design: Provides exceptional off road grip as well as puncture and cut resistance.
Avg. Customer Review:    9star
Reviewed by 22 customers - Own these tires? Write a Review.
The most helpful favorable review

10star (5.0/ 5.0)
The best
By from Ocala Fl on 01/10/14

Vehicle: 2008 Ford F-250 Super Duty
Miles Driven on Tires: 48000
Driving Style: Average
Driving Conditions: Combined Highway/City
Would buy Tire Again?: yes

11 of 11 people found the following review helpful:

Had these tires now for almost 50,000 miles. By far, the best I've ever owned. They're quiet as a church mouse on the road, but the grip off road is killer. Sand, mud, whatever, they pull right through it. I tow a lot (car hauler) and don't understand what other reviews are saying about sidewall sway - these things are as stable as can be. The people complaining about sway probably are not running enough air pressure, because mine have been awesome. Most of the time I forget the trailer is back there, and that's hauling 8000+ lbs. When these finally wear out, I'll be back for more.


Did you find this review helpful?  Yes   No


Back to Top
The most helpful critical review

8star (4.0/ 5.0)
265/75R16 on Landrover Discovery
By from Kelowna Canada on 03/24/12

Vehicle: 2000  
Miles Driven on Tires: 2000
Driving Style: Average
Driving Conditions: Combined Highway/City
Would buy Tire Again?: yes

19 of 20 people found the following review helpful:

These tires are very smooth and silent for a tire with a hybrid all-terrain/ mud-terrain tread pattern. They ride as smooth as any 10 ply I have owned before. On pavement they ride well in both wet and dry conditions, they hold a corner very well traction wise but there is a bit more sidewall flex than the Bridgestone A/T Revo's I had before so they dont feel as sporting. The tread on the Revo's was almost bald so its not really a fair comparison. On dirt they are amazing they stick like glue, hill climbs on loose dirt feels at least 30% more secure than the BFG ALL-terrain KO's I had before the Revo's. These Coopers self clean mud much better than both my previous two tires. They also perform exceptionally well on washboard roads at higher speeds. In mud just a little throttle will easily clean the treads. They seem to be wearing very well. I cannot comment on winter use as I have dedicated winter tires. Overall if you drive fast and agressive on pavement you will find the sidewalls a bit soft. If you drive conservative on road they will work well. Almost any type of off road environment is where they excel.


Did you find this review helpful?  Yes   No


Back to Top

10star (5.0/ 5.0)
Excellent tire
By from Island lake Illinois on 04/13/14

Vehicle: 2006 Ford F-350 Super Duty
Miles Driven on Tires: 500
Driving Style: Average
Driving Conditions: Combined Highway/City
Would buy Tire Again?: yes

0 of 0 people found the following review helpful:

I could not be any happier with these tires. Finally, an aggressive taller tire in a dually size. Way to go cooper!


Did you find this review helpful?  Yes   No


Back to Top

10star (5.0/ 5.0)
Best tire I have ever owned.
By from Pekin IL on 04/10/14

Vehicle: 2012 Ford F-150
Miles Driven on Tires: 500
Driving Style: Aggressive
Driving Conditions: Combined Highway/City
Would buy Tire Again?: yes

1 of 1 people found the following review helpful:

Hands down the best off-road/mud terrain/ all terrain tire I have ever purchased. Quieter than expected. Clean out of mud is also better than expected. Traction in mud is never a problem, and I find myself not using the rear locker as much I had previously with the BFG All Terrains. As far as looks go- hard to beat the aggressive style. And the best part- they are Made in the USA!


Did you find this review helpful?  Yes   No


Back to Top

10star (5.0/ 5.0)
255/80R17
By from Windsor CO on 04/01/14

Vehicle: 2011 RAM 3500
Miles Driven on Tires: 300
Driving Style: Cautious
Driving Conditions: Combined Highway/City
Would buy Tire Again?: yes

3 of 3 people found the following review helpful:

The 255/80R17 is a new size from cooper and exactly what I wanted on my DRW truck. I mostly drive city/highway and tow a 15K fifth wheel in the summer. So far so good. They are very quiet and ride really smooth on the highway. It has only snowed once since putting them on and they performed great. Towing will be the real test, but the short amount I have towed with them they seem stable and not too "squishy" with a load on. If you are looking for a little larger tire for a DRW truck but do not want to run a spacer, this is the tire for you.


Did you find this review helpful?  Yes   No


Back to Top

10star (5.0/ 5.0)
Great Tire!
By from Richmond Va on 03/12/14

Vehicle: 2010 Jeep Wrangler
Miles Driven on Tires: 2000
Driving Style: Average
Driving Conditions: Combined Highway/City
Would buy Tire Again?: yes

3 of 3 people found the following review helpful:

This is a great tire if you are looking for a hybrid mud and all terrain. Also easy to find at a great price and in new sizes. More tires need to be made in the 255/80/17 size and Cooper listened to the customer and provided it. This tire does very well in snow and rain and out performed my previous tires in these conditions. On the little trail riding I have done on these tires they performed great. Excellent side wall flex when aired down even for an E rated tire. Great tire for hwy and offroad use.


Did you find this review helpful?  Yes   No


Back to Top

10star (5.0/ 5.0)
Great tire
By from Oklahoma city Oklahoma on 03/06/14

Vehicle: 2012 RAM 3500
Miles Driven on Tires: 90
Driving Style: Average
Driving Conditions: Combined Highway/City
Would buy Tire Again?: yes

3 of 3 people found the following review helpful:

I have been looking for an aggressive tread tire found this on a forum sight it was a new size and I had a hard time finding them tread depot was able to locate some and deliver way beyond what any local shop could have. These tires look great and ride smooth no issues with the sidewall rolling or road walking so far I'm impressed but it's early I'll see how they are doing months from now..


Did you find this review helpful?  Yes   No


Back to Top

10star (5.0/ 5.0)
Love them so far...
By from Cold Water Michigan on 01/27/14

Vehicle: 2012 RAM 1500
Miles Driven on Tires: 2800
Driving Style: Average
Driving Conditions: Combined Highway/City
Would buy Tire Again?: yes

1 of 2 people found the following review helpful:

We haven't had these long, but I thought I would chime in on how great they are in snow. Went through a snow drift at least 3' tall (packed by the plows) and 10' feet deep to get into our driveway before our guy came to clear it. I figured the worst case if I got stuck, I'd just leave the truck there and walk to the house. Not necessary as it turned out. The ST Maxxes went through it like an ax through a popcicle stick. So far, so good.


Did you find this review helpful?  Yes   No


Back to Top

10star (5.0/ 5.0)
Tires
By from Birmingham Al on 01/27/14

Vehicle: 2012 Ford F-250 Super Duty
Miles Driven on Tires: 1800
Driving Style: Average
Driving Conditions: Combined Highway/City
Would buy Tire Again?: yes

2 of 3 people found the following review helpful:

These are great tires. Good hook-up off road, even in some pretty deep mud. MUCH MUCH more quiet than my Nitto Terra Grapplers were. Like the way they look too.


Did you find this review helpful?  Yes   No


Back to Top

10star (5.0/ 5.0)
Switched from Toyo
By from Nashville Tn on 01/21/14

Vehicle: 2010 Ford F-250 Super Duty
Miles Driven on Tires: 2600
Driving Style: Average
Driving Conditions: Mostly Highway
Would buy Tire Again?: yes

9 of 10 people found the following review helpful:

I've got a 2500 Ford Super Duty Diesel with a leveling kit (pro comp). When we first put everything on, everybody was talking about the Toyo AT2, so we decided to go that way with the extreme size 35x12.50r20. Those wore out right at 47,000 miles, which in my mind is not bad for a tire this size. The problem I had was, I could'nt find any of the AT2's to replace the original set. I tried three shops here in town, plus a few online (including here) and no one had them in stock. I decided to give the ST Maxx a go based on the looks and the price. I'll be honest, I feel pretty good the Toyo's were on backorder. I like the way these look - they set off the truck better and look tougher. The ride is as good as the Toyo's and if anything they are quieter even though the tread - to me at least - is more aggressive. Been through some mud already and this is where they really shine. They clean out better and I've yet to get to point that I needed 4wd. One more thing to mention, Made in the USA. My money is on these.


Did you find this review helpful?  Yes   No


Back to Top

10star (5.0/ 5.0)
Awesome Tires
By from Ft Rucker AL on 01/19/14

Vehicle: 2009 Chevrolet Silverado 1500
Miles Driven on Tires: 45000
Driving Style: Aggressive
Driving Conditions: Combined Highway/City
Would buy Tire Again?: yes

12 of 13 people found the following review helpful:

I have read alot of reviews on this tire and had to comment. I'm at 45K these (275-70R18) and I will easily get another 10-15K out of them before they get to the wear bars. Its a heavy tire built for off road performance and provides great steet manners. I have had all of the squirllyness talked about and the key to the fix is air pressure. This is a E rated tire with a 3 ply sidewall so your normal 35 Psi wont cut it, jeep guys are running 40 psi on them. I have adjusted mine (1500 with a ARE on the back) from 60 to the 35 that they left the tire shop with and turned around and drove it right back to air them up to 50. What Ive found is that 45 works well empty but 50 is a must for my boat (about 4500lbs) Mine are wearing straight across perrfectly. I even carry the original receipt in the glovebox to prove my mileage (which is actually higher due to the taller tire size over the factory change) . So if the tire is flexing, add air pressure at about 5 psi at a time. If you are looking for a durable tire with great on road manners that will push through the slop, look no further. These are the mt's of new without the noise of the old.


Did you find this review helpful?  Yes   No


Back to Top

10star (5.0/ 5.0)
Best Tire Ever
By from Anywhere Everywhere on 11/13/13

Vehicle: 2007 Dodge Ram 2500
Miles Driven on Tires: 50000
Driving Style: Aggressive
Driving Conditions: Track/Racing
Would buy Tire Again?: yes

5 of 5 people found the following review helpful:

I inspect utility poles for power companies and go where ever the line goes. I've been in all elements from SoCal to West VIrginia, West Texas to Glacier NP in Montana and nearly every state in between. I always ran them aired up to 70 psi except on a few occasions and am quite impressed with traction on Sand, Rock, Mud, Snow, Ice. I bought an $8,000 custom suspension to tackle all these environments and never encountered 1 problem with the tires, just wish they came in a 35" size.


Did you find this review helpful?  Yes   No


Back to Top

10star (5.0/ 5.0)
Great Service/Price
By from St. Joseph IL on 09/18/13

Vehicle: 2006 Ford F-150
Miles Driven on Tires: 1000
Driving Style: Average
Driving Conditions: Combined Highway/City
Would buy Tire Again?: yes

4 of 7 people found the following review helpful:

These guys had the cheapest price I have found anywhere on these tires, very good customer service and very fast shipping. I would highly recommend purchasing tires here.


Did you find this review helpful?  Yes   No


Back to Top

9star (4.5/ 5.0)
Great tire
By from Vancouver BC on 09/07/13

Vehicle: 2012 Toyota Tacoma
Miles Driven on Tires: 6000
Driving Style: Aggressive
Driving Conditions: Combined Highway/City
Would buy Tire Again?: yes

9 of 9 people found the following review helpful:

I run my truck on and off road - one third of mileage is off road. I have E load tires for this truck. Slight overkill. These tires are great, they stick on everything: wet, dry, mud, snow. I do not take it easy off road. On pavement 50 psi, off road 24psi. I drive on shale roads and have yet to see any small cuts in these tires. I have had BFG Kelly Dunlop Goodyear and Kumho tires and they all s%$k compared to these tires.


Did you find this review helpful?  Yes   No


Back to Top

9star (4.5/ 5.0)
Great off road tires.
By from San Diego CA on 03/08/12

Vehicle: 2000 Toyota Land Cruiser
Miles Driven on Tires: 9500
Driving Style: Aggressive
Driving Conditions: Track/Racing
Would buy Tire Again?: yes

19 of 20 people found the following review helpful:

These have been great tires for me. My truck is not a daily driver, but I have put about 9500 miles on the tires while on overlanding trips and off road trails. I've put these tires through a lot and they have done very well for me. Been put through high speed washboard roads, over jagged rocks, soft sand, deep soupy mud, and snow! Great traction in everything. Holds well on dirt and rocks, pulls me through mud and sand really nicely, and even has great traction over ice and snow; I couldn't break them loose even when I tried. I've even rubbed the sidewalls against sharp rocks where I thought I was going to rip them open, but nothing even happened. The tires are so tough, that there weren't even any scratch marks. I didn't rate them a full 5 stars, because I have some very, very small chunking. But I figured that is understandable given the weight of the rig especially fully loaded with people and camping gear on trips and the extremely harsh terrain I am constantly driving through. Overall great tires! More aggressive and better traction than all terrain tires, but not as noisy as full mud terrains.


Did you find this review helpful?  Yes   No


Back to Top

9star (4.5/ 5.0)
Absolutely LOVE these tires
By from Hillsborough NJ on 09/07/11

Vehicle: 1996 Ford F-250
Miles Driven on Tires: 1500
Driving Style: Aggressive
Driving Conditions: Combined Highway/City
Would buy Tire Again?: yes

9 of 10 people found the following review helpful:

Once again Cooper has exceeded my expectations. These tires are amazing. Mud, dirt, sand, grass, pavement, and even wet roads have awesome traction. They ride very comfortable at slow and highway speeds and dont have much road noise at all. I would definately reccomend these tires.


Did you find this review helpful?  Yes   No


Back to Top

8star (4.0/ 5.0)
2012 Ram (Cummins) with Cooper ST Maxx
By from Eau Claire  Wi on 01/18/14

Vehicle: 2012 RAM 2500
Miles Driven on Tires: 1000
Driving Style: Average
Driving Conditions: Combined Highway/City
Would buy Tire Again?: yes

4 of 4 people found the following review helpful:

To start with I have a 2012 Ram 2500 Laramie with the Cummins. I replaced the stock BF Goodrich tires and these made my truck look much better aggressively. I have just under 1000 miles on these tires now. I've had them on sloppy winter roads with 8" of snow, icy highways, slush, hardpacked snow, and about every other type of winter weather conditions you can experieince on and offroad and so far very impressed with the handling. I've pulled my 26' enclosed trailer loaded (total of about 8,000# loaded) in the same types of conditions and handling was still great. Only complaints I would have is that the sidewalls seemed a bit soft when loaded which made handling seem a bit awkward. Also the truck rides much rougher than my previous stock BF Goodwrich tires. Overall would definitely buy again. Hope they wear well.


Did you find this review helpful?  Yes   No


Back to Top

8star (4.0/ 5.0)
So Far, So Good
By from helena mt on 03/14/11

Vehicle: 2001 Chevrolet Tahoe
Miles Driven on Tires: 200
Driving Style: Average
Driving Conditions: Combined Highway/City
Would buy Tire Again?: yes

25 of 34 people found the following review helpful:

I know I hate the so far so good reviews but, thye are, and seems as how they are a brand new tire and tread desing I'll opine. Road noise is minimal and I'm the first one to have them in town and I've already had a few questions on them. They look good, side wall "tread" rut gaurd looks good, tread its self with 2 lateral grooves displace slushy snow really well and in the litle bit of mud they were in they did great. The 3-ply armor-tek side walls ride decently well too, not as rough as i thought. They handle fine also, as much as you would ever need for a Tahoe to handle.


Did you find this review helpful?  Yes   No


Back to Top

6star (3.0/ 5.0)
Highway
By from CRYSTA L CITY TEXAS on 05/21/11

Vehicle: 2006 Dodge Ram Pickup
Miles Driven on Tires: 125
Driving Style: Average
Driving Conditions: Track/Racing
Would buy Tire Again?: no

4 of 25 people found the following review helpful:

I got a set of tires 4 the back dully truck. The truck seams that it is hidroplane on hwy on dry conditions. They seams to do great on dirt/sand and light mud. It's on hwy I dont feel to comfortable on.


Did you find this review helpful?  Yes   No


Back to Top

5star (2.5/ 5.0)
BAD TIRES
By from Madison Wisconsin on 07/19/13

Vehicle: 2004 Ford F-150
Miles Driven on Tires: 8000
Driving Style: Average
Driving Conditions: Combined Highway/City
Would buy Tire Again?: no

2 of 11 people found the following review helpful:

I bought Cooper Discoverer ST Maxx tires 1 year ago and have only put 8000 miles on them. They are great for getting through mud or snow or anything but they are all cracking along the rims and all 4 have to be replaced. They are 285/70/17 so the price to replace them is about $1200. I do not recommend these tires.


Did you find this review helpful?  Yes   No


Back to Top

4star (2.0/ 5.0)
Bad tires
By from Newton Falls Ohio on 09/19/11

Vehicle: 1996 Ford F-250
Miles Driven on Tires: 25
Driving Style: Average
Driving Conditions: Combined Highway/City
Would buy Tire Again?: no

14 of 38 people found the following review helpful:

I purchased a set of these tires for the back of my truck. I Hooked up my horse trailer and started down the road and about got in an accident. The back of my truck swayed from side to side like the sidewalls were bending. You could feel the whole truck sway to the outside of turns to the point it felt like it was going to roll over. I've owned this truck for 12 years and never had an All Terrain tire do this. This was my first experince with Cooper tires and it will be my last. I would not recommend these tires if you plan on hauling any kind of load.


Did you find this review helpful?  Yes   No


Back to Top

4star (2.0/ 5.0)
Worst 10 ply tire I ever bought!
By from Avon Minnesota on 05/23/11

Vehicle: 2001 Chevrolet Silverado
Miles Driven on Tires: 50
Driving Style: Average
Driving Conditions: Combined Highway/City
Would buy Tire Again?: no

21 of 57 people found the following review helpful:

I just bought these tires 2 days ago. I ordered them in a 10 ply 285/75/16. When you go around a corner going down the road at just 40 mph, the back of my truck sways to the outside and feels like I'm driving a damn boat. So I thought maybe something is wrong with my truck so we took them off and put them on my buddy's truck and his did the same thing. It's the tires that suck. I can see my center cap going in and out as I make corners with my truck because the sidewall isn't as strong and cooper says they are. My other 285's that are only 8 ply and bald handled better on the road than these. They say you get what you pay for but these tires cost me $1,011 for the set (mounted and balanced) and they are junk. I would of thought I was getting a damn nice tire for the price I payed. NOT! These tires are going to roll off the bead if they keep this up. I can't even pull a tandem trailer with my 3/4 ton truck with these tires. I will NOT buy these tires again and I wouldn't recommend anybody to buy these tires either. At least not in this size. They are unsafe.


Did you find this review helpful?  Yes   No


Back to Top