1. What is Tire Size Comparison?

The Tire Size Comparison calculator computes the difference in circumference between two tires. This helps in understanding how different tire sizes affect vehicle performance, speedometer accuracy, and gear ratios.

2. How Does the Calculator Work?

The calculator uses the simple formula:

Where:

• \( Tire1\ circ \) — Circumference of first tire in inches
• \( Tire2\ circ \) — Circumference of second tire in inches

Explanation: A positive difference means Tire1 is larger than Tire2, while a negative difference means Tire1 is smaller.

3. Importance of Tire Size Comparison

Details: Comparing tire sizes is crucial when changing tire sizes to maintain proper vehicle performance, accurate speedometer readings, and correct gear ratios.

4. Using the Calculator

Tips: Enter the circumference of both tires in inches. The calculator will show the difference between them.

5. Frequently Asked Questions (FAQ)

Q1: Why compare tire circumferences?
A: Circumference differences affect speedometer accuracy, odometer readings, and vehicle performance.

Q2: How much difference is acceptable?
A: Generally, a difference of less than 3% is considered acceptable for most vehicles.

Q3: Where can I find tire circumference?
A: Tire manufacturers provide specifications, or you can calculate it from the tire size markings.

Q4: Does this affect fuel economy?
A: Yes, larger tires typically decrease fuel economy while smaller tires may increase it.

Q5: How does this affect my speedometer?
A: Larger tires will make your speedometer read slower than actual speed, while smaller tires make it read faster.