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Cooper Discoverer STT Pro All-Season 35X12.50R20LT 121Q Tire

  • Based on 235 reviews
Condition: New
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Availability: Only 8 left in stock, order soon!
Fulfilled by Purely Power Sports

Arrives Monday, Aug 25
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Size: 35X12.50R20LT 121Q


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
  • The shoulder of the tire was designed with soft surface cleats and mud scoops
  • Standard Limited Warranty

Description

The Cooper Discoverer STT Pro All-Season 35X12.50R20LT 121Q 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


Seasons: Year Round


Size: 35X12.50R20LT 121Q


Section Width: 12.5 Inches


Load Capacity: 3195 Pounds


Tread Depth: 21 32nds


Tread Type: Non-Directional


Ply Rating: 10-Ply


Rim Width: 10 Inches


Tire Diameter: 35 Inches


Brand: ‎Cooper


Seasons: ‎Year Round


Size: ‎35X12.50R20LT 121Q


Section Width: ‎12.5 Inches


Load Capacity: ‎3195 Pounds


Tread Depth: ‎21 32nds


Tread Type: ‎Non-Directional


Ply Rating: ‎10-Ply


Rim Width: ‎10 Inches


Tire Diameter: ‎35 Inches


Item Diameter: ‎34.7 Inches


Item Weight: ‎68.87 Pounds


UPC: ‎029142829751 781787879538


Global Trade Identification Number: ‎51, 38


Vehicle Tire ISO Metric Size Description: ‎889/12.50R20


Construction Type: ‎Radial


OEM Part Number: ‎90000023673


Manufacturer: ‎Cooper


Model: ‎DISCOVERER STT PRO


Item Weight: ‎68.9 pounds


Item model number: ‎170128006


Is Discontinued By Manufacturer: ‎No


Exterior: ‎BSW Black Side Wall


Manufacturer Part Number: ‎170128006


UTQG: ‎E 10P


Bolt Pattern (Pitch Circle Diameter): ‎1 Decimeters


Date First Available: November 13, 2015


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Aug 25

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


  • Good tires very smooth
Size: 35X12.50R20LT 121Q
Good tires
Reviewed in the United States on June 2, 2025 by Kenneth kelly

  • Satisfied
Size: 33X12.50R20LT 119Q
They hum a bit at low speeds and it increases at highway speeds but to be expected with mud tires. I've heard many that were a lot louder. Good looking and seem to handle o.k. on wet pavement. Haven't done any serious off roading with them yet so will update later. They better work good @ $1971 for a set of 4 tires. Thought for that much it might include some stock in the Cooper co. LOL. ... show more
Reviewed in the United States on August 15, 2024 by ..

  • So far, so good.
Size: 35X12.50R20LT 121Q
So far, I’ve had theses tires on my f150 for 1300 miles. They are a little louder than I was hoping for, but I wasn’t surprised due to their aggressive design. They are a little louder than the Ridge Grapplers. They are similar to the nitto m/t on the noise level. They are reasonably smooth. Most of my driving, so far, has been on the highway with some on gravel roads. The tires look good with their aggressive tread design. The tires seem to handle as well as my ridge grapplers. I have reasonably high expectations for the mileage since that has been my history with Cooper tires in the past, but only time will tell. I have 7000 miles on the tires now, and they are holding up well. They’ve performed well through the summer on these hot Texas and NM roads. They do pick up and sling rocks if driven down gravel roads. ... show more
Reviewed in the United States on April 20, 2024 by Shane Metcalf

  • Awesome tires
Size: LT295/65R20 129/126Q
Background: On my daily driver wrangler that mostly goes over NYC potholes I have only had these tires for a few months but so far they are awesome. They are pretty quiet for hybrid mud tires, work well in the rain and do not hurt my already terrible gas mileage lol. I haven’t used them in snow yet so I can’t comment on that but so far, they are doing everything I asked of them. I would also recommended to check out the specs on Cooper’s website on the size of the tires. I got 295/65/20 and I have yet to find a spare tire cover that fits...plan accordingly. Update 1/4/19 I went to Rausch Creek, Pa to do some off-roading and these tires are legit. At one point, I had a rock poking my tire with no issues, even waited there as my brother took a picture lol. Went on some green,blues, blacks, went through streams and mud with no problems. I probably could have done even tougher trails but I didn’t want to break anything. At the end of the day, I aired back up and was on my way. Again, I one hundred percent recommend. Looking forward to see how they are in the snow but I am sure they are great. ... show more
Reviewed in the United States on November 29, 2018 by Giani B Giani B

  • Great tires
Size: LT275/65R20 126/123Q
I have put 10,000 miles on these tires now and they drive amazing. The tread still looks the same the day I bought them. Highly recommend these tires.
Reviewed in the United States on July 30, 2025 by Micah Murphy

  • Nice Tire
Size: 35X12.50R20LT 121Q
Wanted more aggressive all season This works
Reviewed in the United States on October 15, 2024 by OBFF

  • Good tires at a good price
Size: 35X12.50R20LT 121Q
This is my 3 set of tire of this brand and model. I love everything about them. The seller had them at a good price and they were sent out promptly. Whenever I need a replacement set I’m for sure getting from them again. Thank you guys ..!!!!
Reviewed in the United States on May 8, 2024 by David.J

  • Highly recommend
Size: 38X13.50R20LT 123Q
Great tire ride nice low noise good on and off road
Reviewed in the United States on June 5, 2024 by Warren

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