Cooper

Discoverer Stronghold AT

Name: Cooper Discoverer Stronghold AT LT285/65R18 E
Brand: Cooper
SKU: 170292048
Price: 285.74 USD
Availability: InStock

LT285/65R18 E

All-Weather 3PMSF M+S

$285.74/tire $380.99

Set of 4: $1142.96

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Specifications

Size	LT285/65R18 E Discoverer Stronghold AT
Width	285 mm
Aspect ratio	65
Rim diameter	R18
Load index	125/122
Speed rating	T
Ply rating	10

Season	All-Weather
Treadwear warranty	60,000 miles
Tread depth	16/32"
Weight	57.77 lbs
Max pressure	80 psi
Severe snow (3PMSF)	Yes
Run-flat	No

About the Cooper Discoverer Stronghold AT

All-Weather All-Terrain Passenger Light Truck tire.

Features

* Strong shoulder design features such as scooped tread edges, wide tread grooves and sidewall hook pattern* Wide open grooves in the tread* Cooper's 3D sipe technology* Textured edges on the shoulders* Strategically designed tread lugs* Ledges between the lugs* M+S Rated* Carries the Three-Peak Mountain Snowflake (3PMSF) symbol* 60,000 Mile/96,000 km Limited Treadwear Warranty* 45-Day Satisfaction Guarantee

Benefits

* Provide grip and traction for the life of the tire* Grab and release soft surfaces* Helps to provide stability* Grab into the snow to help provide traction in harsh winter conditions* Help to resist cracking, tearing and rounding of the tread* Help prevent stones getting stuck in the tread* Meets the required performance criteria for Use in Severe Snow Conditions

Understanding the LT285/65R18 E size

In the size code 285/65R18, 285 is the section width in millimetres (about 11.2"). 65 is the aspect ratio — the sidewall height is 65% of the width, or roughly 185.3 mm. R18 means radial construction on a 18-inch wheel, giving an approximate overall diameter of 32.6".

The load index 125 means each tire supports up to 3,638 lbs — about 14,552 lbs across a full set of four. The speed symbol T certifies the tire to 118 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 Stronghold AT is built for

The Cooper Discoverer Stronghold AT is an all-weather tire — a year-round option certified for severe snow service, so it can stay on the vehicle through winter. It carries the three-peak mountain snowflake (3PMSF) symbol, meaning it passed a standardised severe-snow traction test. It is classified for all-terrain (a/t) use.

Price and value

At $285.74 per tire, a full set of four costs $1142.96. That sits close to the average for the 58 tires we stock in this size. Backed by a 60,000-mile treadwear warranty, that works out to roughly $19.05 per 1,000 miles across the set.

Frequently asked questions

What does the tire size 285/65R18 mean?

285 is the section width in millimetres, 65 is the aspect ratio (sidewall height as a percentage of width, about 185.3 mm), and R18 indicates radial construction for a 18-inch wheel. Overall diameter is approximately 32.6 inches.

What are the load and speed ratings of the Cooper Discoverer Stronghold AT LT285/65R18 E?

Its load index of 125 allows up to 3,638 lbs per tire. Its speed rating of T is certified to 118 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 Stronghold AT LT285/65R18 E tires cost?

A single tire is $285.74 and a set of four is $1142.96, covered by a 60,000-mile treadwear warranty.

Is the Cooper Discoverer Stronghold AT rated for snow?

Yes. It carries the three-peak mountain snowflake (3PMSF) symbol, meaning it met a standardised severe snow traction test.

Does the Discoverer Stronghold AT come in other sizes?

Yes — we stock 27 additional Discoverer Stronghold AT sizes besides LT285/65R18 E. Fit only a size approved for your vehicle.