315/70R16 Tire Size in Inches and Millimeters

315/70R16 tires have a diameter of 33.4" (848 mm), a tread width of 12.4" (315 mm), and a wheel diameter of 16" (406.4 mm).The sidewall of the tire is 8.7" (221 mm), and the tire's circumference is 104.9" (2662.7 mm). This means a 315/70R16 tire will make make 604 revolutions per mile, or 376 revolutions per kilometer.

315/70R16 Tire Front
12.4"
33.4"
315/70R16 Tire Side
Tire Circumference
104.9"
16"
8.7"
604 Revs/Mile
SpecInchesMetric
Diameter33.4"848 mm
Width12.4"315 mm
Wheel16"406.4 mm
Sidewall8.7"221 mm
Circum104.9"2662.7 mm
Revolutions604 per mile376 per km

What Does 315/70R16 Mean?

The tire size 315/70R16 is a common size used on many trucks, SUVs, and other larger vehicles.

Here is what each part of the size designation represents:

  • 315: This number represents the width of the tire in millimeters. In this case, the tire is 315 millimeters wide.
  • 70: This number represents the aspect ratio of the tire, which is the height of the tire's sidewall as a percentage of its width. In this case, the sidewall height is 70% of the tire's width.
  • R: This letter indicates the tire's construction type. “R” stands for radial construction, which is the most common type of tire construction today.
  • 16: This number represents the diameter of the wheel that the tire is designed to fit on, in inches. In this case, the tire is designed to fit on a 16-inch wheel.

315/70R16 tire size meaning

How To Convert 315/70R16 Into Inches

The 315/70R16 conversion is fairly simple. The first number in the tire size, 315, represents the width of the tire in millimeters. To convert this to inches, we divide 315 by 25.4 (since there are 25.4 millimeters in an inch). This gives us approximately 12.4 inches.

The second number in the tire size, 70, represents the aspect ratio or the height of the tire as a percentage of its width. To calculate the height in inches, we multiply 12.4 by 0.70, which gives us approximately 8.7 inches.

Finally, the last number in the tire size, 16, represents the diameter of the wheel rim in inches. Therefore, the tire size 315/70R16 can be expressed in inches as roughly 12.4 inches wide, 8.7 inches tall, and designed to fit a 16-inch wheel rim.

Frequently Asked Questions About 315/70R16 Tires

How tall is a 315/70R16 tire?

A 315/70R16 tire has an approximate height, also known as the overall diameter, of 33.4 inches (848 mm). This height can vary slightly depending on the brand and model of the tire, as well as the amount of air pressure in the tire.

How wide is a 315/70R16 tire?

A 315/70R16 tire has a width of approximately 12.4 inches (315 millimeters). The width of the tire is the first number in the tire size designation, which in this case is “315”. It’s important to note that the actual width of the tire may vary slightly depending on the brand and model of the tire, and the width may also be affected by the amount of air pressure in the tire.

Understanding Tire Speed Ratings

When choosing the right tires for your vehicle, understanding the speed rating is crucial. But what exactly is a speed rating, and why does it matter?

What is a Tire Speed Rating?

A tire's speed rating indicates the maximum speed a tire can safely sustain over time. It's a manufacturer's assurance of tire performance, marked by a letter on the tire's sidewall. This rating is determined under controlled laboratory conditions and is part of a broader standard established by industry entities like the European Tyre and Rim Technical Organisation (ETRTO) and the U.S. Department of Transportation.

Common Speed Ratings Explained

  1. P-Rated: Up to 94 mph - Suitable for smaller sedans or light-duty vehicles.
  2. Q-Rated: Up to 100 mph - Often found on SUVs and light trucks with consistent highway use.
  3. R-Rated: Up to 106 mph - Typically for medium-duty trucks and vans.
  4. S-Rated: Up to 112 mph - Common for family sedans and larger vehicles with moderate performance.
  5. T-Rated: Up to 118 mph - Optimal for family vehicles, including minivans and some coupes.

Why is the Speed Rating Important?

The speed rating is not just about how fast you can legally drive; it's about safety and performance:
  • Ensures Safety: It guarantees that the tire can handle certain speeds without overheating and failing, which can prevent blowouts.
  • Optimizes Performance: Higher ratings often indicate better handling characteristics, important for maintaining vehicle stability.
  • Legal and Insurance Considerations: Matching the speed rating suggested by your vehicle manufacturer can be essential for insurance and warranty purposes.
When choosing tires, always refer to your vehicle’s manual to ensure compatibility. Remember, fitting tires with a lower speed rating than recommended can compromise safety and performance, while higher ratings might not provide extra benefits unless you frequently drive at high speeds. By understanding these nuances, you can make an informed choice that suits your driving habits while keeping safety a top priority.

Alternate 315/70R16 Replacement Tire Sizes

Upsizing your wheels or tires? Replacement tires must be within 3% of the diametor of the original tire. The following sizes fall within that range - click on any size to see detailed info about that tire and wheel combination.

SizeDiameterWidthWheel
235/85R1732.8"832 mm17 mm
255/80R1733.1"840 mm17 mm
255/85R1633.1"840 mm16 mm
265/50R2232.5"825 mm22 mm
265/60R2032.5"826 mm20 mm
265/70R1832.6"829 mm18 mm
265/80R1632.7"830 mm16 mm
275/25R2833.4"849 mm28 mm
275/50R2232.9"835 mm22 mm
275/55R2233.9"861 mm22 mm
275/60R2033"838 mm20 mm
275/65R2034.1"866 mm20 mm
275/70R1833.2"843 mm18 mm
275/80R1734.3"872 mm17 mm
285/40R2433"838 mm24 mm
285/50R2233.3"845 mm22 mm
285/55R2234.4"873 mm22 mm
285/60R2033.5"850 mm20 mm
285/65R1832.6"827 mm18 mm
285/70R1732.8"832 mm17 mm
285/70R1833.7"857 mm18 mm
285/75R1632.8"834 mm16 mm
285/75R1733.9"860 mm17 mm
295/25R2833.8"859 mm28 mm
295/30R2633"838 mm26 mm
295/40R2433.3"846 mm24 mm
295/45R2232.5"825 mm22 mm
295/50R2233.7"855 mm22 mm
295/55R2032.8"832 mm20 mm
295/60R2033.9"862 mm20 mm
295/65R1833.1"841 mm18 mm
295/70R1733.3"846 mm17 mm
295/70R1834.3"871 mm18 mm
295/75R1633.4"848 mm16 mm
305/30R2633.2"844 mm26 mm
305/35R2432.4"824 mm24 mm
305/40R2332.6"828 mm23 mm
305/40R2433.6"854 mm24 mm
305/45R2232.8"833 mm22 mm
305/50R2234.1"865 mm22 mm
305/55R2033.2"844 mm20 mm
305/60R1832.4"823 mm18 mm
305/65R1732.6"828 mm17 mm
305/65R1833.6"853 mm18 mm
305/70R1632.8"834 mm16 mm
305/70R1733.9"860 mm17 mm
305/75R1634"864 mm16 mm
315/35R2432.7"830 mm24 mm
315/45R2233.2"843 mm22 mm
315/50R2032.4"824 mm20 mm
315/70R1532.4"823 mm15 mm
315/70R1633.4"848 mm16 mm
325/45R2233.5"851 mm22 mm
325/50R2032.8"834 mm20 mm
325/60R1833.3"847 mm18 mm
345/60R1834.3"871 mm18 mm
355/40R2233.2"843 mm22 mm
355/50R2034"864 mm20 mm
375/45R2033.3"846 mm20 mm
375/50R1832.8"833 mm18 mm