Cooper
Discoverer Rugged Trek
275/55R20 XL
All-Season
M+S
$233.99/tire
$311.99
Set of 4: $935.96
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Specifications
| Size | 275/55R20 XL Discoverer Rugged Trek |
|---|---|
| Width | 275 mm |
| Aspect ratio | 55 |
| Rim diameter | R20 |
| Load index | 117 |
| Speed rating | T |
| Load range | XL |
| Season | All-Season |
|---|---|
| UTQG | 600 A B |
| Treadwear warranty | 60,000 miles |
| Tread depth | 16/32" |
| Weight | 46.52 lbs |
| Max pressure | 50 psi |
| Severe snow (3PMSF) | No |
| Run-flat | No |
About the Cooper Discoverer Rugged Trek
All-Season Mud-Terrain Passenger Light Truck/SUV tire.
Features
* Dual off-road sidewalls, both sides offering long, deep cleats* Earth Diggers™ Technology with large shoulder scoops and lugs* Jutting ridges expel lodged stones* Stable Trac™ Technology - omni-directional, micro-gauge siping* Whisper Grooves™ Technology - specially designed sound barrier walls* M+S Rated* Free 45-Day Test Drive* 60,000 Mile Limited Treadwear Warranty - (Non-LT Sizes Only)
Benefits
* Enhance off road traction* Combine to forcefully dig into dirt, sand and mud* Protect against damage from sharp rocks* Enhances traction on roads and rough surfaces, improving stability and control* Reduce road noise
Understanding the 275/55R20 XL size
In the size code 275/55R20, 275 is the section width in millimetres (about 10.8"). 55 is the aspect ratio — the sidewall height is 55% of the width, or roughly 151.3 mm. R20 means radial construction on a 20-inch wheel, giving an approximate overall diameter of 31.9".
The load index 117 means each tire supports up to 2,833 lbs — about 11,332 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 Rugged Trek is built for
The Cooper Discoverer Rugged Trek 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 mud-terrain (m/t) use.
Tread life and grip ratings
This tire carries a UTQG rating of 600 A B. The treadwear grade of 600 is a relative durability score — a grade of 200 is expected to last roughly twice as long as a grade of 100 under the same controlled test. Traction grade A measures straight-line wet stopping grip (AA is highest, then A, B and C). Temperature grade B reflects heat resistance at sustained speed (A is highest).
Price and value
At $233.99 per tire, a full set of four costs $935.96. That is about 15% above the average of the 156 tires we stock in this size, reflecting its position in the range. Backed by a 60,000-mile treadwear warranty, that works out to roughly $15.60 per 1,000 miles across the set.
Frequently asked questions
What does the tire size 275/55R20 mean?
275 is the section width in millimetres, 55 is the aspect ratio (sidewall height as a percentage of width, about 151.3 mm), and R20 indicates radial construction for a 20-inch wheel. Overall diameter is approximately 31.9 inches.
What are the load and speed ratings of the Cooper Discoverer Rugged Trek 275/55R20 XL?
Its load index of 117 allows up to 2,833 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 Rugged Trek 275/55R20 XL tires cost?
A single tire is $233.99 and a set of four is $935.96, covered by a 60,000-mile treadwear warranty.
Does the Discoverer Rugged Trek come in other sizes?
Yes — we stock 10 additional Discoverer Rugged Trek sizes besides 275/55R20 XL. Fit only a size approved for your vehicle.
