1. What is Tire Size Conversion?

Tire size conversion allows you to calculate equivalent tire sizes when changing wheel diameters or converting between different measurement systems (metric to imperial).

2. How Does the Calculator Work?

The calculator uses the tire size conversion formula:

Where:

• Old Size — Original tire size designation (e.g., 225/45R17)
• Conversion Factor — Multiplier for size conversion

Explanation: The formula maintains the aspect ratio while scaling the tire dimensions according to the conversion factor.

3. Importance of Correct Tire Size

Details: Proper tire sizing is crucial for maintaining accurate speedometer readings, vehicle handling characteristics, and preventing clearance issues.

4. Using the Calculator

Tips: Enter the original tire size and the conversion factor. The calculator will show the new equivalent size.

5. Frequently Asked Questions (FAQ)

Q1: What's a common conversion factor when changing wheel size?
A: When increasing wheel diameter by 1 inch, a factor around 0.96-0.98 is typical to maintain overall diameter.

Q2: How does tire size affect speedometer readings?
A: Larger overall diameter will cause speedometer to read slower than actual speed, smaller diameter shows faster.

Q3: Can I use this for metric to imperial conversions?
A: Yes, with the appropriate conversion factor for the specific measurement (e.g., mm to inches).

Q4: What about plus sizing?
A: Plus sizing typically involves increasing wheel diameter while decreasing tire aspect ratio to maintain similar overall diameter.

Q5: Where can I find recommended conversion factors?
A: Tire manufacturers often provide conversion charts for their specific tire models.