Michelin

Primacy A/S

Name: Michelin Primacy A/S 255/45R21 XL
Brand: Michelin
SKU: 10048
Price: 338.99 USD
Availability: InStock

255/45R21 XL

$338.99/tire $451.99

Set of 4: $1355.96

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

Specifications

Size	255/45R21 XL Primacy A/S
Width	255 mm
Aspect ratio	45
Rim diameter	R21
Load index	106
Speed rating	W
Load range	XL

Treadwear warranty	45,000 miles
Tread depth	8.5/32"
Weight	32.41 lbs
Max pressure	50 psi
Severe snow (3PMSF)	No
Run-flat	No

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 255/45R21 XL size

In the size code 255/45R21, 255 is the section width in millimetres (about 10"). 45 is the aspect ratio — the sidewall height is 45% of the width, or roughly 114.8 mm. R21 means radial construction on a 21-inch wheel, giving an approximate overall diameter of 30".

The load index 106 means each tire supports up to 2,094 lbs — about 8,376 lbs across a full set of four. The speed symbol W certifies the tire to 168 mph under its rated load. Always match or exceed the load index and speed rating listed on your vehicle's door-jamb placard.

Price and value

At $338.99 per tire, a full set of four costs $1355.96. That sits close to the average for the 12 tires we stock in this size. Backed by a 45,000-mile treadwear warranty, that works out to roughly $30.13 per 1,000 miles across the set.

Frequently asked questions

What does the tire size 255/45R21 mean?

255 is the section width in millimetres, 45 is the aspect ratio (sidewall height as a percentage of width, about 114.8 mm), and R21 indicates radial construction for a 21-inch wheel. Overall diameter is approximately 30 inches.

What are the load and speed ratings of the Michelin Primacy A/S 255/45R21 XL?

Its load index of 106 allows up to 2,094 lbs per tire. Its speed rating of W is certified to 168 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 Primacy A/S 255/45R21 XL tires cost?

A single tire is $338.99 and a set of four is $1355.96, covered by a 45,000-mile treadwear warranty.

Does the Primacy A/S come in other sizes?

Yes — we stock 31 additional Primacy A/S sizes besides 255/45R21 XL. Fit only a size approved for your vehicle.