What Size Tire Is 255/65R15 In Inches?
What Size Is Tire 255/65R15 In Inches?
- Diameter of the tire: Approximately 28.1 inches or 713 mm
- Tire width: Approximately 10.0 inches
- Sidewall height: Approximately 6.5 inches (calculated as a percentage of the tire’s width, which is 65% in this case)
- Diameter of the wheel: is 15 inches.
Detailed Explanation:
Here’s a detailed explanation of tire size 255/65R15 in inches:
The tire size 255/65R15 refers to a tire with a width of 255 millimeters, an aspect ratio (or sidewall height as a percentage of the width) of 65%, and a diameter of 15 inches.
Diameter Of The Tire:
To calculate the diameter of the tire, we can use the following formula:
- Diameter = (2 x sidewall height x aspect ratio/100) + wheel diameter (in inches)
First, we need to calculate the sidewall height:
- Sidewall height = width x aspect ratio / 100
- Sidewall height = 255 x 65 / 100 = 165.75 mm
We can then convert the sidewall height to inches:
- Sidewall height = 165.75 mm / 25.4 = 6.52 inches (rounded to the nearest hundredth)
Now we can calculate the diameter of the tire:
- Diameter = (2 x sidewall height x aspect ratio/100) + wheel diameter (in inches)
- Diameter = (2 x 6.52 x 65/100) + 15
- Diameter = 28.09 inches (rounded to the nearest hundredth)
Tire Width:
To calculate the tire width in inches, we can use the following formula:
- Tire width = width in millimeters x 0.03937 inches/millimeter
- Tire width = 255 x 0.03937 = 10.04 inches (rounded to the nearest hundredth)
Sidewall Height:
- As we calculated earlier, the sidewall height is 6.52 inches.
Diameter Of The Wheel:
- The diameter of the wheel is 15 inches.
Therefore, the 255/65R15 tire has an overall diameter of approximately 28.1 inches, a tire width of approximately 10.0 inches, a sidewall height of approximately 6.5 inches, and a wheel diameter of 15 inches. Please note that these are approximate measurements, and actual tire sizes can vary slightly depending on the brand and model of the tire.
Tire Height (Diameter) | 28.1 in | 713 mm |
Wheel Size | 15 in | 381 mm |
Sidewall Height | 6.5 in | 166 mm |
Tire Width | 10 in | 255 mm |
Tire Circumference | 88.1 in | 2,238 mm |
Revolutions per Mile | 719 | |
Revolutions per Kilometer | 446.8 |
What Does It Mean By 255/65R15?
The numbers and letters in a tire size indicate various measurements and characteristics of the tire. Here’s what each component of the tire size 255/65R15 means:
- 255: This number refers to the tire’s section width, which measures the tire from sidewall to sidewall in millimeters.
- 65: This number is the aspect ratio or profile of the tire, representing the height of the tire’s sidewall as a percentage of its width. In this case, the sidewall height is 65% of the section width.
- R: This letter indicates the tire’s construction type, with “R” for radial construction.
- 15: This number indicates the diameter of the wheel rim that the tire is designed to fit, measured in inches.
Therefore, the 255/65R15 tire is a radial tire with a section width of 255 millimeters, an aspect ratio of 65%, and designed to fit on a 15-inch diameter wheel rim.
FAQs
What Vehicles Can Use 255/65r15 Tires?
255/65R15 tires are not a common size and may not fit most vehicles. They are most commonly used on older pickup trucks or SUVs.
Can I Replace A 255/65r15 Tire With A Different Size Tire?
It is not recommended to replace a tire with a different size than the one specified by the manufacturer, as it can affect the handling and performance of the vehicle.
What Does The “R” Stand For In 255/65r15?
The “R” in 255/65R15 indicates the tire has radial construction.
What Are The Load Index And Speed Rating Of A 255/65r15 Tire?
The load index and speed rating can vary depending on the specific tire model. It is important to check the tire specifications to ensure they meet the vehicle’s requirements.
Are 255/65r15 Tires Suitable For Winter Driving?
It depends on the tire model and its winter performance capabilities. Some 255/65R15 tires may be suitable for winter driving, while others may need more traction in snowy or icy conditions.
How Is A 255/65r15 Tire Compatible With My Vehicle?
You can check the vehicle owner’s manual or consult a tire professional to determine if a 255/65R15 tire is suitable for your specific vehicle to make and model.