Discoverer STT PRO

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 LT315/70R17 E size

In the size code 315/70R17, 315 is the section width in millimetres (about 12.4"). 70 is the aspect ratio — the sidewall height is 70% of the width, or roughly 220.5 mm. R17 means radial construction on a 17-inch wheel, giving an approximate overall diameter of 34.4".

The load index 121 means each tire supports up to 3,197 lbs — about 12,788 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 $299.24 per tire, a full set of four costs $1196.96. That is about 8% above the average of the 61 tires we stock in this size, reflecting its position in the range.