1. What is Tire Height?

Tire height is the overall diameter of a tire when mounted and inflated. It's an important measurement that affects vehicle handling, speedometer accuracy, and clearance.

2. How Does the Calculator Work?

The calculator uses the tire height formula:

Where:

• \( \text{Sidewall} \) — The height of the tire's sidewall (inches)
• \( \text{Rim} \) — The diameter of the wheel rim (inches)

Explanation: The total tire height is calculated by doubling the sidewall height (since there are sidewalls on both sides of the rim) and adding the rim diameter.

3. Importance of Tire Height Calculation

Details: Proper tire height is crucial for maintaining accurate speedometer readings, ensuring proper vehicle clearance, and maintaining the intended handling characteristics of the vehicle.

4. Using the Calculator

Tips: Enter sidewall height and rim diameter in inches. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Where can I find my tire's sidewall height?
A: The sidewall height is often marked on the tire sidewall as the aspect ratio (e.g., 65 in 215/65R15). You'll need to calculate it from the tire width and aspect ratio.

Q2: Does tire height affect fuel economy?
A: Yes, larger tires can decrease fuel economy by increasing rolling resistance and changing the effective gear ratio.

Q3: How much can I change my tire height before it causes problems?
A: Generally, staying within ±3% of the original tire height is recommended to avoid significant speedometer errors or clearance issues.

Q4: Why is tire height important for 4WD/AWD vehicles?
A: 4WD/AWD systems require all tires to be the same height to prevent damage to the drivetrain components.

Q5: How does tire height affect speedometer readings?
A: Larger tires will make the speedometer read slower than actual speed, while smaller tires will make it read faster.