Toyo Proxes RR 315/30R18 Tires

Toyo Proxes RR 315/30R18 SL is a track and competition tire.

Toyo Proxes RR 315/30R18 SL Tire Specs

315/30R18 is a Metric tire. It also comes in a P-Metric (P315/30R18) 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 315/30R18 tire is 315 millimeters.

30 represents the aspect ratio of a tire, which is a ratio of the tire's sidewall height to its width. For 315/30R18 tire, the sidewall height is 30% of its tread width.

R denotes that 315/30R18 tire has radial construction.

18 represents the wheel diameter in inches that the tire is designed to fit. 315/30R18 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.

Maximum inflation for Toyo Proxes RR 315/30R18 tire is 51 psi.

Uniform Tire Quality Grading System (UTQG) rating for Toyo Proxes RR 315/30R18 tire is 40 C A.

Tire manufacturer part number (MPN) is 255180.

Toyo Proxes RR
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315/30R18 Dimensions Chart

Toyo Proxes RR 315/30R18 tire has a diameter of 25.5", a width of 12.4", mounts on a 18" rim, and makes 791 revolutions per mile.

Metric Inches
Tire Width 315 mm 12.4"
Aspect Ratio 30%
Rim Diameter 457 mm 18"
Tire Diameter 647 mm 25.5"
Sidewall Height 95 mm 3.7"
Circumference 2032 mm 80.1"
Revolutions 492 per km 791 per mile

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