2023-2026
2017-2022
2011-2016
2008-2010
1999-2007
Installation Time
(approx) 1 Hour
Difficulty Level:
Simple installation for anyone.
Installation Guides
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Cooper Discoverer STT Pro Mud-Terrain Tire (37" - 37x12.50R20LT)
Item SSD57241
Our Price
$536.99 each
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$26.85 Available in AT Cash Rewards.
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Product Information
Features, Description, Q&A, Specs & Installation
Features & Specs
- Tire
- Tire Size (37" - 37x12.50R20LT)
- Armor-Tek3 Construction for Sidewall and Tread Durability
- Hybrid 3-2 Tread Center Pattern for Stability and Road Manners
- Alternating Shoulder Lugs & Mud Scoops for Lateral and Soft Terrain Traction
- Stone Ejector Ribs and Mud-Release Dimples to Prevent Clogging
- Rock-Climber Sidewall Technology with Climber Cleats & Flex Grooves
- M+S Rated with Silica-Infused Compound for All-Season Use
- Load Range E – 126 Load Index (~3,750 lb)
- Fits 20-Inch Wheels (8.5–11" Width)
- Has 37.0" Overall Diameter × 12.6" Section Width
- Has 21/32" Tread Depth—Built for Rugged Terrain
- One-Hour Installation
- Limited Warranty
- Universal Fitment
| Brand | Cooper |
| Tire Model | Discoverer STT Pro |
| Tire Type | Mud-Terrain |
| Tire Size | 37" - 37x12.50R20 |
| Tire Diameter | 37 |
| Tire Load Index | 126 (3748 lbs per tire) |
| Tire Load Rating | E |
| Tire Tread Depth | 21/32" |
| Tire Revs Per Mile | 545 |
| Tire Speed Rating | (Q) Up to 99mph |
| Tire Weight | 59.98 |
Description
Extreme Traction for the Toughest Terrain. The Cooper Discoverer STT Pro Mud-Terrain Tire (37" - 37x12.50R20LT) is built for off-road enthusiasts who demand maximum grip and rugged durability. As Cooper’s most advanced mud-terrain tire, it provides unmatched traction in mud, loose dirt, sand, and rocky terrain while maintaining stability and control on the road.
Aggressive Tread Design. Featuring large, deep tread blocks and alternating shoulder lugs, the Cooper Discoverer STT Pro Mud-Terrain Tire (37" - 37x12.50R20LT) delivers powerful off-road bite and enhanced self-cleaning capability. Wide voids between tread blocks ensure mud and debris are ejected efficiently, keeping traction strong in the harshest conditions.
Armor-Tek3 Build. Built with Cooper’s exclusive 3-ply Armor-Tek3 carcass construction, this Cooper Discoverer STT Pro Mud-Terrain Tire (37" - 37x12.50R20LT) provides superior protection against punctures, cuts, and impacts. Reinforced sidewalls not only add durability but also deliver extra traction when navigating ruts and rocky trails.
37-Inch Stance for Maximum Presence. Sized at 37x12.50R20LT, this Cooper Discoverer STT Pro Mud-Terrain Tire (37" - 37x12.50R20LT) provides towering ground clearance and a wide, aggressive footprint. Perfect for lifted trucks and custom off-road builds, it enhances both capability and visual impact.
Installation. Putting this Cooper Discoverer STT Pro Mud-Terrain Tire (37" - 37x12.50R20LT) on your vehicle takes 1 hour to install.
Warranty. There is a limited warranty on this product.
Application. The Cooper Discoverer STT Pro Mud-Terrain Tire (37" - 37x12.50R20LT) offers universal fitment.
Cooper 170309006
CA Residents: 
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Installation & What's in the Box
Installation Info
What's in the Box
- (1) Tire
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4.8
Reviews of Cooper Tire Products (24)
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