Discoverer STT Pro 121Q

Mud Terrain tires offer drivers traction on off-road terrains such as mud, dirt, sand, gravel, and rock, and are commonly used on CUVs, SUVs, light trucks, and jeeps.

Vehicle

This product is not covered by a manufacturer’s treadlife warranty.

Mileage Warranty

The maximum carrying capacity for a tire determined by the manufacturer.

Load Index

Maximum speed capability to safely carry a load for an extended period of time.

Max Speed

The maximum load carrying strength at the specified inflation pressure, also known as ply rating.

Load Range

The side of the tire between the tread and rim, with cosmetic branding as well as information about the tire including manufacturer, model, size, etc.

Sidewall

Measured in 32nds of an inch, this metric shows how much tread life is left on a tire, with the tire's traction & stopping capabilities greatly diminished at 4/32nds and less. Tire manufacturers include "tire wear bars" at 2/32nds to indicate when your tire is worn out.

Tread Depth

The highest inflation pressure (measured in pounds of force per square inch, PSI) the tire is designed to contain, and should only be used when called for by the vehicle placard.

Inflation Pressure

An identifier of a particular tire line and size combination assigned by the tire manufacturer.

Part Number

Tread design (or tread pattern) can affect handling, traction & noise for different driving styles & road conditions.

Tread Design

Tire Weight

The measurement of width from a tires inner sidewall to the outer sidewall.

Section Width

The range of widths the rim of the vehicle can be for this tire to be safely mounted on.

Rim Range

The diameter of a tire that is inflated without any load applied.

Overall Diameter

Evolution M/T 121Q

The maximum carrying capacity for a tire determined by the manufacturer  
                (Single wheel applications / Dual wheel applications).

Molded specifically for optional use with studs. Studs not included. Stud sizes in TSMI (Tire Stud Manufacturer Index). Studs Restricted in certain states.

Studdable

Yes, Cooper tires are covered for defects in workmanship and manufacturing; in addition, Cooper offers a 45-Day Test Drive policy and up to an 80k mile treadwear warranty on select tires.

Cooper Tires has manufacturing facilities in Mississippi, Ohio, and Arkansas, and makes most of their tires at one of those facilities. Some Cooper tires could also be made in China.

Cooper mud terrain tires

3304 reviews on Cooper tires

4.6

91%

Review breakdown

Scorecard

Dry

Wet

Winter

Comfort

Noise

Treadwear

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