Michelin Primacy A/S 225/55R18 Primacy A/S
Michelin

Primacy A/S

225/55R18
All-Season M+S
$203.24/tire $270.99
Set of 4: $812.96
Minimum order: 4 tires (sizes can be mixed) ? Selling in sets of 4 is how we keep our prices this low — and a matching set keeps your car balanced and safe.
Most drivers replace all four for even wear and handling.
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Specifications

Size225/55R18 Primacy A/S
Width225 mm
Aspect ratio55
Rim diameterR18
Load index98
Speed ratingH
Load rangeSL
SeasonAll-Season
UTQG540 A A
Treadwear warranty45,000 miles
Tread depth8.5/32"
Weight26.2 lbs
Max pressure44 psi
Severe snow (3PMSF)No
Run-flatNo

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 225/55R18 size

In the size code 225/55R18, 225 is the section width in millimetres (about 8.9"). 55 is the aspect ratio — the sidewall height is 55% of the width, or roughly 123.8 mm. R18 means radial construction on a 18-inch wheel, giving an approximate overall diameter of 27.7".

The load index 98 means each tire supports up to 1,653 lbs — about 6,612 lbs across a full set of four. The speed symbol H certifies the tire to 130 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 Michelin Primacy A/S is built for

The Michelin Primacy A/S 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. Fitment category: Passenger Car, Performance, HP.

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 $203.24 per tire, a full set of four costs $812.96. That is about 33% above the average of the 107 tires we stock in this size, reflecting its position in the range. Backed by a 45,000-mile treadwear warranty, that works out to roughly $18.07 per 1,000 miles across the set.

Frequently asked questions

What does the tire size 225/55R18 mean?

225 is the section width in millimetres, 55 is the aspect ratio (sidewall height as a percentage of width, about 123.8 mm), and R18 indicates radial construction for a 18-inch wheel. Overall diameter is approximately 27.7 inches.

What are the load and speed ratings of the Michelin Primacy A/S 225/55R18?

Its load index of 98 allows up to 1,653 lbs per tire. Its speed rating of H is certified to 130 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 225/55R18 tires cost?

A single tire is $203.24 and a set of four is $812.96, 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 225/55R18. Fit only a size approved for your vehicle.

Other sizes of this model

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