P315/40R18 in Inches

P315/40R18 tire size conversion to inches with detailed visualization of tire height, width, diameter, rim size and more.

What is P315/40R18 in inches?

When we convert P315/40R18 to inches, it is equivalent to 27.9x12.4R18. Let us break down the tire size dimensions for better understanding. 12.4 inches or 315 mm stand for section width, or width of the tire tread. 27.9 inches or 709 mm represent the overall diameter of the tire, or tire height. 18 inches is the rim diameter, or the diameter of the wheel the tire can be mounted on.

P315/40R18 Section Width
P315/40R18 Tire Side
Tire Circumference
723 Revs/Mile
Metric Inches
Overall Diameter 709 mm 27.9"
Tread Width 315 mm 12.4"
Rim Diameter 457 mm 18"
Sidewall Height 126 mm 5"
Circumference 2226 mm 87.6"
Revolutions 449 per km 723 per mile
Best Prices on P315/40R18 Tires

What is P315/40R18 tire width?

P315/40R18 tire has a width of 12.4 inches or 315 mm that reflects the measurement of tire's width from its inner sidewall to its outer sidewall at the widest point (excluding decorations, protective ribs or raised letters). Tire width is also called tread width, section width or cross section width. Tire width should be measured without any load placed upon the tire after it has been properly inflated and mounted on its industry assigned measuring rim.

What is P315/40R18 tire height?

P315/40R18 tire has an overall diameter of 27.9 inches or 709 mm that represents the outer diameter of the tire or tire height.

What is P315/40R18 tire sidewall height?

P315/40R18 tire has a sidewall height of 5 inches or 126 mm which is the measurement of tire sidewall from the wheel rim to the top of tire tread. Tire sidewall height or "profile" depends on aspect ratio - lower aspect ratio means lower tire profile.

What is P315/40R18 rim diameter?

Rim or wheel diameter is generally measured in inches, representing the size of the wheel the tire can be mounted on. P315/40R18 tire can be mounted on 18 inch wheels.

What is P315/40R18 tire circumference?

P315/40R18 tire has a circumference of 87.6 inches or 2226 mm that represents the outer perimeter of the tire.

How many revolutions P315/40R18 tire makes?

Tire revolutions indicate the number of times a tire revolves while it covers the distance of a mile or a kilometer. P315/40R18 tire completes 723 revolutions per mile or 449 revolutions per kilometer.

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