Pirelli P Zero (PZ4) 285/30R21 Tires

Pirelli P Zero (PZ4) 285/30R21 XL 100Y is an ultra high performance summer tire.

Pirelli P Zero (PZ4) 285/30R21 XL 100Y Tire Specs

285/30R21 is a Metric tire. It also comes in a High-Load (HL285/30R21) variant

Let us decode each aspect of the tire size code to have a full understanding what this tire size means.

285 is a section width of the tire from one sidewall to the other. Tire tread width is typically a bit narrower than the section width. Section width of 285/30R21 tire is 285 millimeters.

30 represents the aspect ratio of a tire, which is a ratio of the tire's sidewall height to its width. For 285/30R21 tire, the sidewall height is 30% of its tread width.

R denotes that 285/30R21 tire has radial construction.

21 represents the wheel diameter in inches that the tire is designed to fit. 285/30R21 can be mounted on rims with 21 inches in diameter.

XL denotes the load range of a tire. XL stands for Extra Load. Tires with this designation are constructed to carry more weight than standard load tires of the same size. This is achieved by reinforcing the tire's construction, often through additional or stronger layers known as plies.

100 indicates the load index. A tire with a load index of 100 can support a maximum load of 1764 pounds or 800 kilograms per tire.

Y indicates the speed rating. A tire with a speed rating of Y is approved for speeds up to 186 miles per hour or 299 kilometers per hour under optimal conditions.

Uniform Tire Quality Grading System (UTQG) rating for Pirelli P Zero (PZ4) 285/30R21 tire is 280 AA A.

Tire manufacturer part number (MPN) is 3140100.