All Season

About the Firestone All Season

All-Season Passenger Car tire.

Features

* Deep sipes* Specially engineered* 55,000 Mile Limited Warranty (CUV intended sizes)* 65,000 Mile Limited Warranty (All other sizes)* Gold Pledge Limited Warranty* Buy and Try 30-Day Guarantee

Benefits

* Provide wet and all-season performance* To provide performance in wet, dry and snowy conditions with traction and handling all year long

Understanding the 235/55R18 size

In the size code 235/55R18, 235 is the section width in millimetres (about 9.3"). 55 is the aspect ratio — the sidewall height is 55% of the width, or roughly 129.3 mm. R18 means radial construction on a 18-inch wheel, giving an approximate overall diameter of 28.2".

The load index 100 means each tire supports up to 1,764 lbs — about 7,056 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.

Tread life and grip ratings

This tire carries a UTQG rating of 480 A B. The treadwear grade of 480 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 $136.49 per tire, a full set of four costs $545.96. That is about 14% below the average price of the 147 tires we stock in this size. Backed by a 55,000-mile treadwear warranty, that works out to roughly $9.93 per 1,000 miles across the set.