1. What is a Tire Size Calculator Comparison?

Definition: This calculator compares two tire sizes by calculating the difference in their diameters.

Purpose: It helps vehicle owners and mechanics understand how different tire sizes will affect speedometer accuracy, clearance, and performance.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Diff \) — Difference between tire diameters (inches)
• \( TD1 \) — First tire diameter (inches)
• \( TD2 \) — Second tire diameter (inches)

Explanation: The calculator subtracts the second tire's diameter from the first to show the size difference.

3. Importance of Tire Size Comparison

Details: Understanding tire size differences helps maintain proper speedometer calibration, prevents rubbing issues, and ensures optimal vehicle performance.

4. Using the Calculator

Tips: Enter both tire diameters in inches. The result shows how much larger or smaller the first tire is compared to the second.

5. Frequently Asked Questions (FAQ)

Q1: How do I find my tire diameter?
A: The overall diameter can be calculated from tire size numbers (e.g., 225/45R17) or found in tire specifications.

Q2: What's considered a significant difference?
A: Differences greater than 0.5 inches may affect speedometer accuracy by more than 1-2%.

Q3: Does this account for wheel width differences?
A: No, this only compares diameters. Wheel width affects how the tire sits but not its diameter.

Q4: Can I compare metric and imperial sizes?
A: Yes, as long as both diameters are entered in inches.

Q5: How does this difference affect my vehicle?
A: Larger tires make your speedometer read slower, while smaller tires make it read faster. Significant differences may require recalibration.