What tire size is 105/80R13 in Inches?
A 105/80R13 tire in inches has the following dimensions:
Tire height (diameter): 19.7 inches (500.38 mm)
Wheel size: 13 inches (330.2 mm)
Sidewall height: 3.15 inches (80 mm)
Tire width: 4.13 inches (105 mm)
Tire circumference: 61.9 inches (1,572.26 mm)
Revolutions per mile: 1034.4
Revolutions per kilometer: 643.1
Tire sizes can confuse many people, with various numbers and letters denoting different things. One such size is 105/80R13, which can leave many wondering what it means and how it relates to tire performance. In this article, we will break down the meaning of 105/80R13, discuss the significance of the letter “R,” and explain how to convert this metric size to inches.
Understanding Tire Sizes:
Tire sizes consist of a series of numbers and letters that denote specific characteristics of the tire. The first number, 105, in this case, represents the tire’s width in millimeters. The second number, 80, represents the aspect ratio, which is the height of the tire’s sidewall as a percentage of its width. The “R” signifies the tire’s construction type, with R standing for radial. The final number, 13, represents the tire’s diameter in inches.
The Significance of 105/80R13
Now let’s focus on 105/80R13, which is a standard tire size for small to mid-sized vehicles. Here’s what each part of the code represents:
105: The width of the tire in millimeters. In this case, the tire is 105 millimeters wide.
80: The aspect ratio or profile of the tire is the ratio of the tire’s height to its width. In this case, the tire’s height is 80% of its width.
R: The construction type of the tire, which stands for radial. This means that the tire’s internal layers are arranged radially or at right angles to the direction of travel.
13: The rim diameter in inches that the tire is designed to fit. In this case, the tire is compatible with a 13-inch rim.
What Each Component of the Tire Size Represents:
Understanding each component of the tire size can help you make informed decisions about your vehicle’s tire and wheel fitment. Here’s a breakdown of what each measurement represents:
Overall diameter: This is the height of the tire from the bottom to the highest point at the top of the tire through its exact center when inflated and unloaded. The 105/80R13 tire has an overall diameter of 19.6 inches (498.2 millimeters).
Section width: This is the measurement of the tire’s thickest point, the distance between the outer sidewall and the inner sidewall’s widest point, also called the tread width or section width. The 105/80R13 tire has a section width of 4.1 inches (105 millimeters).
Rim height: This is the height of the rim on which the tire can be mounted. The 105/80R13 tire can be mounted on a 13-inch rim height.
Sidewall height is the distance between the rim and the outer edge of the tire’s tread, expressed as a percentage of tire width. The 105/80R13 tire has a sidewall height of 3.3 inches (84 millimeters).
Circumference: This measures the distance the tire travels in one revolution. The 105/80R13 tire has a circumference of 61.6 inches (1565.1 millimeters).
Revolutions per mile: This indicates the number of times a tire rotates while it covers the distance of one mile. The 105/80R13 tire performs 1028.2 revolutions per mile.
When selecting tires and wheels for your vehicle, it’s essential to consider the manufacturer’s recommended tire size and width range. Putting very narrow or wide tires on rims can affect the tire’s performance and reduce your vehicle’s overall performance. The 105/80R13 tire has a recommended tire width range of 3.5-5 inches.
Q: Is 105/80R13 a typical tire size?
A: 105/80R13 is not a commonly used tire size, but it may be found on certain smaller vehicles.
Q: Can I use a tire with a different aspect ratio than my original tire?
A: Using a tire with a different aspect ratio than the one specified by your vehicle’s manufacturer is not recommended, as this can affect its handling and stability.
Q: How do I know if a tire is compatible with my vehicle?
A: You can check your vehicle’s owner’s manual or consult a tire professional to determine which tire sizes are compatible with your vehicle.
Q: What vehicles typically use 105/80R13 tires?
A: 105/80R13 tires are often used on small passenger cars and some utility vehicles.
Q: Can I use a tire with a different width than my original tire?
A: Using a tire with a different width than what is specified by your vehicle’s manufacturer is not recommended, as it can impact the vehicle’s handling and safety.
Q: What is the difference between radial and bias-ply tires?
A: Radial tires have plies that run perpendicularly from the bead to the tread, while bias-ply tires have plies that crisscross diagonally. Radial tires generally provide better handling and longevity than bias-ply tires.
Q: Can I change the aspect ratio of my tires for better performance?
A: Changing the aspect ratio of your tires can affect your vehicle’s handling, stability, and speedometer accuracy. It is best to consult with a tire professional to determine the best aspect ratio for your car.
Q: How do I know when to replace my tires?
A: It’s essential to replace your tires when the tread depth is worn down to 2/32 of an inch or if there are visible signs of damage or aging, such as cracks, bulges, or punctures.
The 105/80R13 tire has an overall diameter of 19.6 inches, a section width of 4.1 inches, and can be mounted on a 13-inch rim height. Each component of the tire size plays a crucial role in your vehicle’s overall performance, affecting its speedometer accuracy, acceleration, and fuel efficiency. Understanding these measurements and fitment considerations can help you make informed decisions about your vehicle’s tires and wheels.