Pirelli P Zero (PZ4) 275/40R21 Tires

Pirelli P Zero (PZ4) 275/40R21 XL 107Y is an ultra high performance summer tire with run-flat capability priced from $505.79.

Pirelli P Zero (PZ4) 275/40R21 XL 107Y Tire Specs

275/40R21 is a Metric tire used as an original equipment on a variety of popular passenger cars and sport utility vehicles.

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

275 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 275/40R21 tire is 275 millimeters.

40 represents the aspect ratio of a tire, which is a ratio of the tire's sidewall height to its width. For 275/40R21 tire, the sidewall height is 40% of its tread width.

R denotes that 275/40R21 tire has radial construction.

21 represents the wheel diameter in inches that the tire is designed to fit. 275/40R21 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.

107 indicates the load index. A tire with a load index of 107 can support a maximum load of 2149 pounds or 975 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.

Pirelli P Zero (PZ4) 275/40R21 is a run-flat tire designed to resist the effects of deflation when punctured, and to enable the vehicle to continue to be driven at a reduced speed for a limited distance.

Maximum inflation for Pirelli P Zero (PZ4) 275/40R21 tire is 50 psi.

Uniform Tire Quality Grading System (UTQG) rating for Pirelli P Zero (PZ4) 275/40R21 tire is 320 AA A.

Tire manufacturer part number (MPN) is 2751400.