What is 315/40R21 tire diameter?
The 315/40R21 has an overall diameter of 30.9 inches or 785 mm tall (Measurement of a tire’s outside diameter through its exact center when inflated with no load.)
How wide is a 315/40R21 tire’s width?
The 315/40R21 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 outer sidewall’s widest point and the inner 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.
What is a 315/40R21 tire sidewall height?
The 315/40R21 has a sidewall height of 5 inches or 126 mm tall. It’s measured from the rim to the outer edge of the tire.
What size rim do you need for 315/40R21?
The 315/40R21 tire has a size rim of 21 inches or 533 mm. This number represents the distance between the two bead seat areas where the tire is sealed onto the wheel.
How many revolutions for 315/40R21 per mile or kilometer?
The 315/40R21 performs 653 revolutions per mile or 406 revolutions per kilometer. Revolutions per mile indicate the number of times a tire revolves while it covers the distance of one mile/kilometer
How about 315/40R21 tire circumference?
The circumference of 315/40R21 is 97.1 inches or 2466 mm.
What’s wider or narrow than 315/40R21 is acceptable?
You can replace the 315/40R21 tires that are within ±3% of the overall tire diameter. In this case, it’s between 30 and 31.8 inches (761mm to 809 mm). Check our tire size chart here or the tire size calculator tool here to find your size.
