Tire Size
Tire 1 (Original)
/
R
Tire 2 (New)
/
R
Tire Size Comparison & Upsizing
Changing your car's tire size affects the speedometer, odometer, and ground clearance. This tool compares your stock tire with a new size to show the percentage difference in diameter and speed reading.
Reading a Tire Sidewall
Example: 205/55 R16
- 205: Width in millimeters.
- 55: Aspect Ratio (Height is 55% of Width).
- R: Radial construction.
- 16: Rim diameter in inches.
Safety Warning
When changing sizes, try to keep the overall diameter variance within 3%. A larger difference can cause:
- Speedometer errors (showing lower than actual speed).
- Brake failure (ABS system confusion).
- Tires rubbing against the wheel well.
FAQ
Can I use wider tires?
Yes, wider tires offer better grip but may reduce fuel economy and increase road noise. Ensure they fit your rim width.