31x12.50R15 Tire Size

Understanding 31x12.50R15 tire size is crucial for making informed decisions when purchasing new tires, whether it is for replacement or upgrade, as it plays an important role in your vehicle's performance and safety. Let's explore 31x12.50R15 tire size specs and dimensions, what vehicles are equipped with 31x12.50R15 tires and what are its replacement alternatives.

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What does 31x12.50R15 mean?

31x12.50R15 is a Flotation tire size that is commonly used on light trucks and commercial vehicles that require extra durability and load carrying capacity. Let us decode each aspect of 31x12.50R15 tire size dimensions for better understanding.

  • 31 - this number represents the overall diameter of a tire when it is fully inflated and not under load. For this particular tire size, tire's diameter is 31 inches.
  • 12.50 - this number indicates tire's section width, which includes the entire width of the tire from one sidewall to the other. The tread width is typically a bit narrower than the section width. Since this is a Flotation tire size, this measurement is in inches. So section width of this particular tire is 12.50 inches.
  • R - this letter denotes that tire has radial construction.
  • 15 - the last number indicates the wheel diameter in inches that the tire is designed to fit. 31x12.50R15 can be mounted on rims with 15 inches in diameter.
31x12.50R15 Section Width
31x12.50R15 Tire Side
Tire Circumference
651 Revs/Mile
Metric Inches
Tread Width 317.5 mm 12.50"
Aspect Ratio 64%
Rim Diameter 381 mm 15"
Tire Diameter 787.4 mm 31"
Sidewall Height 203.2 mm 8"
Circumference 2472 mm 97.3"
Revolutions 405 per km 651 per mile

What vehicles use 31x12.50R15 tire size?

No vehicles found.

What are replacement alternatives for 31x12.50R15 tire?

Replacement tires have to be within 3% of the original tire's overall diameter to ensure safe drive and proper speedometer readings. Below is a list of replacement and plus tire sizes that are within the optimal characteristics of the original 31x12.50R15 tire size.

Keep in mind that different vehicles have different tire requirements. Passenger cars, SUVs, trucks, and high-performance vehicles each have specific types of tires that are engineered for their particular needs. When replacing tires on your vehicle, always refer to your vehicle's owner's manual for manufacturer recommendations on tire size, type, and other specifications.

Replacement Tire Size Overall Diameter Difference
LT325/60R15 -2.1%
P305/70R15 2.6%
325/60R15 -2.1%
305/70R15 2.6%
P305/60R17 1.3%
305/60R17 1.3%

What wheels can 31x12.50R15 tire be mounted on?

31x12.50R15 tires are generally approved to be mounted on 8.5" to 11" wide wheels. The follwing wheel sizes can be used:

  • 15x8.5
  • 15x9
  • 15x9.5
  • 15x10
  • 15x10.5
  • 15x11

All listed guides, data and/or calculations are for informational purposes only. Tire-Sizes.com does not warrant or make any representations regarding the accuracy of or the results of the use of this information.