Cooper

Discoverer Stronghold AT

Name: Cooper Discoverer Stronghold AT LT275/70R17 E
Brand: Cooper
SKU: 170279048
Price: 237.74 USD
Availability: InStock

LT275/70R17 E

All-Weather 3PMSF M+S

$237.74/tire $316.99

Set of 4: $950.96

🚚 Standard shipping across the country — delivered with DHL in 2-6 business days. 🔒 SSL-secured checkout.

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

Specifications

Size	LT275/70R17 E Discoverer Stronghold AT
Width	275 mm
Aspect ratio	70
Rim diameter	R17
Load index	124/121
Speed rating	R
Ply rating	10

Season	All-Weather
Treadwear warranty	60,000 miles
Tread depth	16.5/32"
Weight	52.03 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 LT275/70R17 E size

In the size code 275/70R17, 275 is the section width in millimetres (about 10.8"). 70 is the aspect ratio — the sidewall height is 70% of the width, or roughly 192.5 mm. R17 means radial construction on a 17-inch wheel, giving an approximate overall diameter of 32.2".

The load index 124 means each tire supports up to 3,527 lbs — about 14,108 lbs across a full set of four. The speed symbol R certifies the tire to 106 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 $237.74 per tire, a full set of four costs $950.96. That sits close to the average for the 23 tires we stock in this size. Backed by a 60,000-mile treadwear warranty, that works out to roughly $15.85 per 1,000 miles across the set.

Frequently asked questions

What does the tire size 275/70R17 mean?

275 is the section width in millimetres, 70 is the aspect ratio (sidewall height as a percentage of width, about 192.5 mm), and R17 indicates radial construction for a 17-inch wheel. Overall diameter is approximately 32.2 inches.

What are the load and speed ratings of the Cooper Discoverer Stronghold AT LT275/70R17 E?

Its load index of 124 allows up to 3,527 lbs per tire. Its speed rating of R is certified to 106 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 LT275/70R17 E tires cost?

A single tire is $237.74 and a set of four is $950.96, 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 LT275/70R17 E. Fit only a size approved for your vehicle.