---
product_id: 18918503
title: "Cooper Discoverer STT Pro All-Season 31X10.50R15LT 109Q Tire | Light Truck Mud Terrain All Season Traction 109Q Rated C (6 Ply) Radial Construction Raised White Letters Tire"
brand: "cooper"
price: "€ 1455.48"
currency: EUR
in_stock: true
category: "Cooper"
url: https://www.desertcart.hr/products/18918503-cooper-discoverer-stt-pro-all-season-31x10-50r15lt-109q-tire
store_origin: HR
region: Croatia
---

# 31-inch diameter for commanding presence All-season traction with advanced mud clearing Armor Tek3 10-ply sidewall durability Cooper Discoverer STT Pro All-Season 31X10.50R15LT 109Q Tire | Light Truck Mud Terrain All Season Traction 109Q Rated C (6 Ply) Radial Construction Raised White Letters Tire

**Brand:** cooper
**Price:** € 1455.48
**Availability:** ✅ In Stock

## Summary

> 🛞 Elevate your off-road game with unstoppable traction and rugged durability!

## Quick Answers

- **What is this?** Cooper Discoverer STT Pro All-Season 31X10.50R15LT 109Q Tire | Light Truck Mud Terrain All Season Traction 109Q Rated C (6 Ply) Radial Construction Raised White Letters Tire by cooper
- **How much does it cost?** € 1455.48 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/18918503-cooper-discoverer-stt-pro-all-season-31x10-50r15lt-109q-tire)

## Best For

- cooper enthusiasts

## Why This Product

- Trusted cooper brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **All-Season Versatility:** Year-round performance that balances aggressive off-road traction with smooth on-road handling.
- • **Stone Armor Technology:** Innovative tread channels and ridges expel stones and debris, extending tire life and reliability.
- • **Load & Speed Confidence:** Rated 109Q with 2270 lbs load capacity and 50 psi max pressure for heavy-duty light truck demands.
- • **Unmatched Off-Road Dominance:** Conquer rugged terrain with deep Climber Cleats and Mud Slingers 2.0 for relentless grip.
- • **Armor Tek3 Sidewall Protection:** 10-ply radial construction engineered to resist punctures and sidewall damage on the toughest trails.

## Overview

The Cooper Discoverer STT Pro 31X10.50R15LT is a premium all-season, off-road tire featuring a 10-ply Armor Tek3 radial construction for superior sidewall strength. Designed for extreme terrain, it combines advanced tread technologies like Climber Cleats, Mud Slingers 2.0, and Stone Armor to deliver exceptional grip, mud clearing, and stone resistance. Rated 109Q with a 2270 lbs load capacity, this tire offers year-round versatility without compromising on-road traction, making it the ultimate choice for serious light truck and SUV enthusiasts.

## Description

The Cooper Discoverer STT Pro All-Season 31X10.50R15LT 109Q 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.

## 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

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B014HH7B9E |
| Automotive Fit Type | Universal Fit |
| Best Sellers Rank | #907,697 in Automotive ( See Top 100 in Automotive ) #1,746 in Light Truck & SUV All-Terrain & Mud-Terrain Tires |
| Brand Name | Cooper |
| Construction Type | Radial |
| Customer Reviews | 4.4 4.4 out of 5 stars (68) |
| Global Trade Identification Number | 00029142829454, 00291428294540 |
| Included Components | Tire Only |
| Item Diameter | 30.75 inches |
| Item Dimensions | 30.75 x 30.75 x 10.7 inches |
| Item Type Name | Tire |
| Item Weight | 46.1 pounds |
| Load Capacity | 2270 pounds |
| Load Index | 109 |
| Load Range | C |
| Manufacturer | Cooper |
| Manufacturer Part Number | 170110034 |
| Manufacturer Warranty Description | Standard Limited Warranty |
| Maximum Pressure | 50 psi |
| Model Number | 170110034 |
| OEM Equivalent Part Number | COOP-90000023638 |
| Ply | 10-Ply |
| Rim Size | 15 inches |
| Seasons | Year Round |
| Section Width | 10.5 inches |
| Size | 31X10.50R15LT 109Q |
| Spare Tire Mounting Location | Front or Rear |
| Speed Rating | Q |
| Tire Aspect Ratio | 10.5 |
| Tire Diameter | 31 inches |
| Tread Depth | 20 thirty_seconds_inches |
| Tread Type | Non-Directional |
| UPC | 826825966358 291428294540 029142829454 |
| Unit Count | 1 Count |
| Vehicle Tire ISO Metric Size Description | 31/10.50R15 |

## Product Details

- **Brand:** Cooper
- **Load Capacity:** 2270 pounds
- **Load Index:** 109
- **Rim Size:** 15 inches
- **Section Width:** 10.5 inches
- **Size:** 31X10.50R15LT 109Q
- **Speed Rating:** Q
- **Tire Aspect Ratio:** 10.5
- **Tread Depth:** 20 thirty_seconds_inches
- **Tread Type:** Non-Directional

## Images

![Cooper Discoverer STT Pro All-Season 31X10.50R15LT 109Q Tire | Light Truck Mud Terrain All Season Traction 109Q Rated C (6 Ply) Radial Construction Raised White Letters Tire - Image 1](https://m.media-amazon.com/images/I/81yAZbtaAIL.jpg)
![Cooper Discoverer STT Pro All-Season 31X10.50R15LT 109Q Tire | Light Truck Mud Terrain All Season Traction 109Q Rated C (6 Ply) Radial Construction Raised White Letters Tire - Image 2](https://m.media-amazon.com/images/I/81I28TchhBL.jpg)
![Cooper Discoverer STT Pro All-Season 31X10.50R15LT 109Q Tire | Light Truck Mud Terrain All Season Traction 109Q Rated C (6 Ply) Radial Construction Raised White Letters Tire - Image 3](https://m.media-amazon.com/images/I/81xvHD9ODOL.jpg)
![Cooper Discoverer STT Pro All-Season 31X10.50R15LT 109Q Tire | Light Truck Mud Terrain All Season Traction 109Q Rated C (6 Ply) Radial Construction Raised White Letters Tire - Image 4](https://m.media-amazon.com/images/I/91YhnE1-VBL.jpg)
![Cooper Discoverer STT Pro All-Season 31X10.50R15LT 109Q Tire | Light Truck Mud Terrain All Season Traction 109Q Rated C (6 Ply) Radial Construction Raised White Letters Tire - Image 5](https://m.media-amazon.com/images/I/51giAMFQoeL.jpg)

## Questions & Answers

**Q: Do these have white letters?**
A: This is going to be an all black sidewall. Thanks!

**Q: are these 10 ply tires?**
A: Listing states 10 ply

**Q: How badly will my MPGs drop with these tires?**
A: I lost almost 20%.  That being said... They are awesome tires.

**Q: Will these fit on a 15x8 wheel?**
A: Hello, 
These will not fit a 15x8 wheel.  This tire fits a15x8.5" to 15x11" wheel. 
Thanks,

## Frequently Bought Together

- Cooper Discoverer STT Pro All-Season 31X10.50R15LT 109Q Tire
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- Rough Country Black Steel 15x8 | 5x4.5 | -19mm-RC158545 Wheel with Painted and Center Cap is not Included. (15 x 8. inches /5 x 4 inches, -19 inches Offset)

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**Shop now:** [https://www.desertcart.hr/products/18918503-cooper-discoverer-stt-pro-all-season-31x10-50r15lt-109q-tire](https://www.desertcart.hr/products/18918503-cooper-discoverer-stt-pro-all-season-31x10-50r15lt-109q-tire)

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-08-09*