Bridgestone Potenza RE050A RFT 215/40R18 Tires

Bridgestone Potenza RE050A RFT 215/40R18 SL 85Y is an ultra high performance summer tire with run-flat capability.

Bridgestone Potenza RE050A RFT 215/40R18 SL 85Y Tire Specs

215/40R18 is a Metric tire used as an original equipment on a variety of popular passenger cars. It also comes in a P-Metric (P215/40R18) variant

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

215 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 215/40R18 tire is 215 millimeters.

40 represents the aspect ratio of a tire, which is a ratio of the tire's sidewall height to its width. For 215/40R18 tire, the sidewall height is 40% of its tread width.

R denotes that 215/40R18 tire has radial construction.

18 represents the wheel diameter in inches that the tire is designed to fit. 215/40R18 can be mounted on rims with 18 inches in diameter.

SL denotes the load range of a tire. Standard Load or SL tires are typically found on passenger cars, smaller SUVs, and light trucks. These tires are designed to operate at standard inflation pressures and are not meant for carrying heavy loads.

85 indicates the load index. A tire with a load index of 85 can support a maximum load of 1135 pounds or 515 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.

Bridgestone Potenza RE050A RFT 215/40R18 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 Bridgestone Potenza RE050A RFT 215/40R18 tire is 51 psi.

Uniform Tire Quality Grading System (UTQG) rating for Bridgestone Potenza RE050A RFT 215/40R18 tire is 140 A A.

Tire manufacturer part number (MPN) is 118414.