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The Cooper Discoverer STT Pro All-Season LT305/55R20 E 121Q 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.

More details

Tire season

All-Season

Manufacturer

Cooper

Tire width

305 mm

Tire load range

E

Tire load index

121

Vehicle fitment type

Universal

Warranty distance

0 miles

Is run flat

N

Overall diameter

33.5 in

Tire speed rating

Q

Vehicle type

Light Truck

Tire size

305/55R20

Construction type

Radial

Electric vehicle tire

N

Automotive parts division

Off-Road

Wheel diameter

20 in

Flotation tire

N

Maximum vehicle rim width

11.00

Mud & snow rated

Y

Uniform tire quality grade (utqg)

0

Features

Wet or Dry, Low Maintenance, All-Weather

Items included

Tire Only

Recommended use

Fleet Vehicle

Minimum vehicle rim width

8.50

Total count

1

Vehicle class designator

LT

Tire location

Front and Rear Tires

Tire sidewall style

Black

Tire terrain

All-Terrain

Tire diameter

20 in

Tire type

Light Truck & SUV Tires

Model

245204

Tread depth

20.5 in

Maximum inflation pressure

65 psi

Tire aspect ratio

55

Tire treadwear rating

0