Cooper

Discoverer STT PRO

Name: Cooper Discoverer STT PRO 33X12.50R15LT C
Brand: Cooper
SKU: 170107034
Price: 233.99 USD
Availability: InStock

33X12.50R15LT C

All-Season M+S

$233.99/tire $311.99

Set of 4: $935.96

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↩️ Free returns within 30 days — unmounted tires, prepaid label, no return shipping cost.

Specifications

Size	33X12.50R15LT C Discoverer STT Pro
Width	33 mm
Aspect ratio
Rim diameter	R15
Load index	108
Speed rating	Q
Ply rating	6

Season	All-Season
Tread depth	21/32"
Weight	57.75 lbs
Max pressure	35 psi
Severe snow (3PMSF)	No
Run-flat	No

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 33X12.50R15LT C size

In the size code 33R15, 33 is the section width in millimetres (about 1.3"). R15 means radial construction on a 15-inch wheel.

The load index 108 means each tire supports up to 2,205 lbs — about 8,820 lbs across a full set of four. 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 $233.99 per tire, a full set of four costs $935.96. That sits close to the average for the 44 tires we stock in this size.

Frequently asked questions

What does the tire size 33R15 mean?

33 is the section width and R15 indicates radial construction for a 15-inch wheel.

What are the load and speed ratings of the Cooper Discoverer STT PRO 33X12.50R15LT C?

Its load index of 108 allows up to 2,205 lbs per tire. 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 33X12.50R15LT C tires cost?

A single tire is $233.99 and a set of four is $935.96.

Does the Discoverer STT PRO come in other sizes?

Yes — we stock 42 additional Discoverer STT PRO sizes besides 33X12.50R15LT C. Fit only a size approved for your vehicle.