Cooper Discoverer STT PRO 38X15.50R20LT E Discoverer STT Pro
Cooper

Discoverer STT PRO

38X15.50R20LT E
All-Season M+S
$444.74/tire $592.99
Set of 4: $1778.96
Minimum order: 4 tires (sizes can be mixed) ? Selling in sets of 4 is how we keep our prices this low — and a matching set keeps your car balanced and safe.
Most drivers replace all four for even wear and handling.
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Specifications

Size38X15.50R20LT E Discoverer STT Pro
Width38 mm
Aspect ratio
Rim diameterR20
Load index128
Speed ratingQ
Ply rating10
SeasonAll-Season
Tread depth21/32"
Weight94 lbs
Max pressure65 psi
Severe snow (3PMSF)No
Run-flatNo

About the Cooper Discoverer STT PRO

All-Season All-Terrain Passenger Light Truck tire.

Features

* 3-2 inner tread ribs* Alternating shoulder lugs* Mud Slingers™ 2.0 offer deep, wide trenches with additional notches* Stone Armor™ Technology* Earth Diggers™ Technology* Armor Tek3® construction* Rock Climber Sidewall™ Technology* M+S Rated* Standard Limited Warranty

Benefits

* Unique hybrid 3-2 tread pattern reduces noise and increases stability* Enhance traction in mud and soft surfaces* Continuously clear thick mud from the tire* Protects the tire from damage caused by sharp rock and debris* With large shoulder scoops and lugs, digs deeper into mud, sand or dirt* Provides incredible tread and sidewall durability on tough terrain* “Climber cleats” and flex grooves that grip jagged rock and power through mud

Understanding the 38X15.50R20LT E size

In the size code 38R20, 38 is the section width in millimetres (about 1.5"). R20 means radial construction on a 20-inch wheel.

The speed symbol Q certifies the tire to 99 mph under its rated load. Always match or exceed the load index and speed rating listed on your vehicle's door-jamb placard.

What the Cooper Discoverer STT PRO is built for

The Cooper Discoverer STT PRO is an all-season tire, balancing dry grip, wet traction and tread life across spring, summer and autumn conditions. It carries an M+S (mud and snow) marking for light winter service. It is classified for all-terrain (a/t) use.

Price and value

At $444.74 per tire, a full set of four costs $1778.96. That sits close to the average for the 14 tires we stock in this size.

Frequently asked questions

What does the tire size 38R20 mean?

38 is the section width and R20 indicates radial construction for a 20-inch wheel.

What are the load and speed ratings of the Cooper Discoverer STT PRO 38X15.50R20LT E?

Its speed rating of Q is certified to 99 mph. Check your door-jamb placard and do not fit a tire rated below the vehicle's requirement.

How much does a set of 4 Cooper Discoverer STT PRO 38X15.50R20LT E tires cost?

A single tire is $444.74 and a set of four is $1778.96.

Does the Discoverer STT PRO come in other sizes?

Yes — we stock 42 additional Discoverer STT PRO sizes besides 38X15.50R20LT E. Fit only a size approved for your vehicle.

Other sizes of this model

Similar tires in 38/R20

Nitto MUD Grappler 38X15.50R20LT D Mud Grappler
Nitto
MUD Grappler
38X15.50R20LT D
$495.75/tire
$1983.00 set of 4