What is a 315/30R18 tire width?
The 315/30R18 has a width of 12.4 inches or 315 mm wide. This is the measurement of the tire at its thickest point, the distance between the inner sidewall’s widest point and the outer sidewall’s widest point. This physical width of the tire can change if the tire is mounted on a wheel slightly wider or narrower than the size indicated by the rim width.
How tall is a 315/30R18 tire’s height?
The 315/30R18 has an overall diameter of 25.5 inches or 647 mm tall (measured from the outside edges of the wheel)
What size rim do I need for 315/30R18?
The size rim of a 315/30R18 tire is 18 inches or 457 mm tall. This number represents the distance between the two bead seat areas where the tire is sealed onto the wheel.
How tall is a 315/30R18 tire sidewall’s height?
The sidewall height of a 315/30R18 is 3.7 inches or 95 mm tall. It’s measured from the rim to the outer edge of the tire.
What about 315/30R18 tire circumference?
315/30R18 tire has a circumference of 80.1 inches or 2035 mm
How many revolutions for 315/30R18 per mile & kilometer?
The 315/30R18 performs 491 revolutions per kilometer or 790 revolutions per mile. Revolutions per mile indicate the number of times a tire revolves while it covers the distance of one mile/kilometer
What’s wider or narrow than 315/30R18 is acceptable?
You can replace the 315/30R18 tires that are within ±3% of the overall tire diameter. In this case, it’s between 24.7 and 26.3 inches (628mm to 666 mm). Check our tire size chart here or the tire size calculator tool here to find your size.

