Atturo AZ850 DR 315/40R18 Tires

Atturo AZ850 DR 315/40R18 XL 108Y is a track and competition tire.

Atturo AZ850 DR 315/40R18 XL 108Y Tire Specs

315/40R18 is a Metric tire. It also comes in a P-Metric (P315/40R18) variant

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

315 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 315/40R18 tire is 315 millimeters.

40 represents the aspect ratio of a tire, which is a ratio of the tire's sidewall height to its width. For 315/40R18 tire, the sidewall height is 40% of its tread width.

R denotes that 315/40R18 tire has radial construction.

18 represents the wheel diameter in inches that the tire is designed to fit. 315/40R18 can be mounted on rims with 18 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.

108 indicates the load index. A tire with a load index of 108 can support a maximum load of 2205 pounds or 1000 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.

Maximum inflation for Atturo AZ850 DR 315/40R18 tire is 50 psi.

Uniform Tire Quality Grading System (UTQG) rating for Atturo AZ850 DR 315/40R18 tire is 100 A A.

Tire manufacturer part number (MPN) is DR850-D3KL8ATA.