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Latitude Sport 3
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Specifications
| Size | 255/55R18 XL Latitude Sport 3 Run Flat (*) |
|---|---|
| Width | 255 mm |
| Aspect ratio | 55 |
| Rim diameter | R18 |
| Load index | 109 |
| Speed rating | V |
| Load range | XL |
| UTQG | 220 AA A |
|---|---|
| Treadwear warranty | 20,000 miles |
| Tread depth | 8.5/32" |
| Weight | 40.45 lbs |
| Max pressure | 50 psi |
| Severe snow (3PMSF) | No |
| Run-flat | No |
About the Michelin Latitude Sport 3
Summer Ultra-High Performance Passenger SUV and Crossover tire.
Features
* Chosen by some of the world's best vehicle manufacturers* New tread compound and increased void ratio* Variable thickness sipes* Eco Feature - Michelin Green X* 20,000 Mile Manufacturer's Treadwear Limited Warranty (Speed Rating: V/W/Y)**Mileage Warranty Exceptions may apply* Standard Limited Warranty (All Michelin® Tires)
Benefits
* Engineered to excel in wet conditions with improved wet grip* Reduce tread block deformation for lower rolling resistance
Understanding the 255/55R18 XL size
In the size code 255/55R18, 255 is the section width in millimetres (about 10"). 55 is the aspect ratio — the sidewall height is 55% of the width, or roughly 140.3 mm. R18 means radial construction on a 18-inch wheel, giving an approximate overall diameter of 29".
The load index 109 means each tire supports up to 2,271 lbs — about 9,084 lbs across a full set of four. The speed symbol V certifies the tire to 149 mph under its rated load. Always match or exceed the load index and speed rating listed on your vehicle's door-jamb placard.
Tread life and grip ratings
This tire carries a UTQG rating of 220 AA A. The treadwear grade of 220 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 AA measures straight-line wet stopping grip (AA is highest, then A, B and C). Temperature grade A reflects heat resistance at sustained speed (A is highest).
Price and value
At $269.24 per tire, a full set of four costs $1076.96. That is about 42% above the average of the 83 tires we stock in this size, reflecting its position in the range. Backed by a 20,000-mile treadwear warranty, that works out to roughly $53.85 per 1,000 miles across the set.
Frequently asked questions
What does the tire size 255/55R18 mean?
255 is the section width in millimetres, 55 is the aspect ratio (sidewall height as a percentage of width, about 140.3 mm), and R18 indicates radial construction for a 18-inch wheel. Overall diameter is approximately 29 inches.
What are the load and speed ratings of the Michelin Latitude Sport 3 255/55R18 XL?
Its load index of 109 allows up to 2,271 lbs per tire. Its speed rating of V is certified to 149 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 Michelin Latitude Sport 3 255/55R18 XL tires cost?
A single tire is $269.24 and a set of four is $1076.96, covered by a 20,000-mile treadwear warranty.
Does the Latitude Sport 3 come in other sizes?
Yes — we stock 39 additional Latitude Sport 3 sizes besides 255/55R18 XL. Fit only a size approved for your vehicle.