Primacy A/S

About the Michelin Primacy A/S

All-Season High Performance/Ultra High Performance Passenger Car tire.

Features

* Circumferential grooves* Zig-zag sipes* M+S Rated* 55,000 Mile/90,000 km Manufacturer's Treadwear Limited Warranty (V/H/T-Rated)* 45,000 Mile/75,000 km Manufacturer's Treadwear Limited Warranty (W/Y-Rated)* Mileage Warranty Exceptions - Split Fitments and ZP (Zero Pressure) tires - the maximum Mileage Warranty for ZP tires is 30,000 miles/50,000 kms* Standard Manufacturer's Limited Warranty

Benefits

* Help to evacuate water from the tire's footprint and reduce the risk of hydroplaning* Provide excellent grip and enhanced traction on wet or light snow covered roads

Understanding the 275/50R21 XL size

In the size code 275/50R21, 275 is the section width in millimetres (about 10.8"). 50 is the aspect ratio — the sidewall height is 50% of the width, or roughly 137.5 mm. R21 means radial construction on a 21-inch wheel, giving an approximate overall diameter of 31.8".

The load index 113 means each tire supports up to 2,535 lbs — about 10,140 lbs across a full set of four. The speed symbol Y certifies the tire to 186 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 540 A A. The treadwear grade of 540 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 A reflects heat resistance at sustained speed (A is highest).

Price and value

At $262.49 per tire, a full set of four costs $1049.96. That is about 10% below the average price of the 12 tires we stock in this size. Backed by a 45,000-mile treadwear warranty, that works out to roughly $23.33 per 1,000 miles across the set.