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Cooper

Cooper Discoverer STT Pro All-Season LT285/70R17 121/118Q Tire

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Availability: 15 left in stock
Fulfilled by Autoplicity ✅
Arrives Tuesday, Sep 29
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Size: LT285/70R17 121/118Q


Features

  • All-Season Off-Road Traction Tire
  • The most extreme all-season, off-road tire Cooper offers to date
  • Provides remarkable off-road performance without sacrificing on-road traction
  • Tread design helps to prevent stone retention
  • Armor Tek3 construction for added tire durability

Description

The Cooper Discoverer STT Pro All-Season LT285/70R17 121/118Q Tire is the most extreme all-season, off-road tire Cooper offers to date, providing remarkable off-road performance without sacrificing on-road traction. The Discoverer STT Pro tire delivers best-in-class off-road performance, empowering the extreme off-roader to take on the toughest challenges. Patented Armor Tek3 tire technology adds strength to the tire sidewall, providing increased resistance to damage while driving over boulders and uneven, tough terrain. The Discoverer STT Pro comes with rubber formulated to combat shredding and damage from stones and off-road obstacles. The ROCK CLIMBER SIDEWALL gets max traction to help conquer even the toughest obstacles with deep ‘Climber Cleats’ and Flex Grooves built into the side of the tire that grip jagged rocks and power through thick mud. The MUD SLINGERS 2.0 are deep, wide trenches with additional notches throughout the tread combine to give you more grip to power through and help continuously clear thick mud from the tire. The EARTH DIGGERS can tackle tricky terrain with large blocks with alternating mud scoops that forcefully dig into loose dirt, sand or sticky mud. The STONE ARMOR TECHNOLOGY provides the ultimate durability with channels, ridges, and edges designed to help defend against sharp rocks and debris while expelling lodged stones.

Brand: Cooper


Size: LT285/70R17 121/118Q


Rim Size: 17 inches


Section Width: 28.5 centimeters


Tire Aspect Ratio: 70


Load Index: 121


Speed Rating: Q


Load Capacity: 3195 pounds


Tread Depth: 19 thirty_seconds_inches


Tread Type: Non-Directional


Rim Size: 17 inches


Load Index: 121


Speed Rating: Q


Load Capacity: 3195 pounds


Tread Type: Non-Directional


Maximum Pressure: 80 psi


Automotive Fit Type: Universal Fit


Load Range: E


Construction Type: Radial


Seasons: Year Round


Brand Name: Cooper


UPC: 291428294922 029142829492 739027207788


Global Trade Identification Number: 92, 22


Number of Packs: 1


Item Highlight: Light Truck Mud Terrain All Season Traction 121/118Q Rated E (10 Ply) Radial Construction Raised White Letters Tire


Unit Count: 1 Count


OEM Equivalent Part Number: 9023652


Included Components: Tire Only


Item Type Name: Tire


Manufacturer: Cooper


Model Number: 170114034


Manufacturer Part Number: 170114034


Manufacturer Warranty Description: Standard Limited Warranty


Size: LT285/70R17 121/118Q


Section Width: 28.5 centimeters


Tire Aspect Ratio: 70


Tread Depth: 19 thirty_seconds_inches


Rim Width: 8.5 inches


Tire Diameter: 33.03


Item Dimensions: 33.03 x 33.03 x 11.5 inches


Item Diameter: 35 inches


Item Weight: 27.49 kg


Vehicle Tire ISO Metric Size Description: 285/70R17


Spare Tire Mounting Location: Front or Rear


Ply: 10-Ply


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, Sep 29

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • Amazing.
Size: LT315/70R17 121/118Q
Quiet and rugged. I was super leiry of buying tires on line. These tires are amazing. Very little if any road noise. Went from 265 to 315. Felt very little loss of power. The difference on the trails were significant. These tires bite and release the mud better than I could have imagined. Absolutely love the look, agility, and off road capabilities. Would highly recommend. I have tried uploading a picture but it won't let me. Anywho. They are amazing ... show more
Reviewed in the United States on January 25, 2025 by George Hammack
    • Excellent purchase!!
Size: 40X13.50R17LT 121Q
Review Image by Amazon Customer
Great tires! surprisingly quiet for this type of tire.
Reviewed in the United States on June 1, 2026 by Amazon Customer
    • This is my second set of these tires
Size: LT315/70R17 121/118Q
My first set of the Discovery STT Pro lasted approximately 42,000 miles and still had enough tread to go another year. I decided to swap out my old tires because they have been on my Jeep for almost 10 years and due to an alignment issue there was some cupping. The new tires are amazing. There is very little road noise and the Jeep handles very well. I think as these tires wear out the road noise will increase (I believe this has been typical of other tires I've had on my previous Jeep). Overall I am very happy with the previous tread life of these tires and impressed with their on-road performance. ... show more
Reviewed in the United States on October 12, 2023 by John Sweazen
    • Worth every penny & very quiet on the highway
Size: LT315/70R17 121/118Q
Review Image by craig sanders
Review Image by craig sanders
The tires are excellent for rock crawling, playing in the mud and sand excellent traction on gravel roads deep snow and slush. So far I have driven 6,000 highway miles on them and they still have the nipples on the tires. You must rotate them every 6,000 miles. And make sure they're still balanced. Downside is even though the tires are factory syped slowing down on wet roads and ice is terrible but you expect those two things when you order mud tires that's not made for either of those things for stopping power. ... show more
Reviewed in the United States on December 15, 2023 by craig sanders
    • Great looking tires. Great value.
Size: LT285/70R17 121/118Q
Review Image by Wisconsin H.
Been running these for about 5,000 miles and they are holding up Great! Much quieter than expected, no sliding in the rain like the stock tires, balanced well and great value for these tires. They run smooth but the only difference I noticed was losing approx 1 mpg. But for the value and performance, I'll take it. ... show more
Reviewed in the United States on December 16, 2024 by Wisconsin H.
    • Great tires for my 1 ton
Size: LT265/70R17 121/118Q
Strengths Exceptional Off-Road Capability Excellent traction in mud, dirt, sand, and loose surfaces thanks to the aggressive tread and self-cleaning design. Designed to eject rocks and debris to help maintain grip and reduce punctures. Solid Durability & Toughness Reinforced construction helps resist cuts, chips, and sidewall damage in rough conditions. I can report long tread life for a mud-terrain tire, with some getting 30,000-40,000+ miles with proper rotations. Surprisingly Good Highway Manners for a Mud Terrain Compared to other MTs, it can ride with less vibration and “trip-truck bounce” on pavement. Decent in Wet Conditions Deep grooves and siping help evacuate water and give respectable wet traction for this class. Limitations Noise & Comfort Trade-Off Like most mud-terrain tires, expect noticeable road noise and a firmer ride Vibration and comfort can suffer more than on all-terrain or highway tires. Winter & Ice Performance Performs okay in light to moderate snow, but lack of a 3-Peak Mountain Snowflake rating means it isn’t a dedicated winter tire. Ice traction is generally weak compared to snow-rated or winter-specific tires. Fuel Economy & Rolling Resistance Aggressive tread increases rolling resistance, which can slightly reduce fuel economy compared with highway or all-terrain tires. Experiences I genuinely love them for off-road and daily use Positive: traction and grip off-road, especially mud and loose gravel. Tread durability is often better than expected for an MT tire. Highway manners are better than average for aggressive mud tires. Critical: Road noise and vibration can be louder than all-terrain options. Performance on ice or packed snow is mediocre without winter ratings. Who This Tire Is Best For Ideal for: Off-road enthusiasts who need serious mud, rock, and dirt capability Trucks & 4×4 vehicles that split time between trail and highway Drivers who prioritize grip and durability over quiet ride and fuel savings Not ideal for: Primarily highway-only drivers Drivers living in areas with heavy winter ice/snow needing rated winter tires Those seeking the quietest, smoothest ride possible ... show more
Reviewed in the United States on December 28, 2025 by Jason E.
    • Great price for 37's
Size: 37X12.50R17LT 124Q
I've been running the Cooper Discoverer Pro STT's for a while now and needed to replace 2 of my tires. Amazon had the best price on 37x12.50R17's I could find, plus I didn't have to pay a bunch for shipping. These tires are great! Not a ton of road noise and they hold up great while off roading.
Reviewed in the United States on July 2, 2025 by SomethingWitty
    • Cooper Discoverer STT LT255/75R17 - Jeep MAGIC
I purchased 4 of these off off Amazon for my 2018 Jeep Wrangler JL 4-door. The JL is the newest Wrangler platform with an aluminum body. I have 75 days and 4,000 miles on these tires for my evaluation. First, they are direct "bolt-on" - no need for a lift kit or any modification. The tires weigh 54 pounds each. The tread is oriented more for off-road than "all-terrain" in my opinion which is exactly what I was looking for. I have driven them many miles on muddy trails and they do a great job at both traction and not clogging up with mud. On pavement they are not quiet but they are at a lower hum than a pair of Coopers I had in 2008 on a 4x4. The hum is certainly tolerable and as good as could be expected. My biggest surprise is the wet road braking response of these tires. It is excellent. I have had some in the past that were like a sled on a down hill snow slope when it came to wet weather braking. UPDATE: 14 Feb 2022 -- 4 years and 45,000 total miles. These Coopers surprised me for the longedivity I got out of them. There's nothing I didn't really like about them. I'm back here to buy my next set. I thought about switching up, going maybe with Geolander, but these really worked out for my 2018 Wrangler JL. I would buy these tires again in a heartbeat. No regrets. ... SAVANNAH WILL ... show more
Reviewed in the United States on January 26, 2019 by Savannah WILL

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