Tire Size to Wheel Equivalence

This serves as a general guide for tire compatibility with different wheel widths. While specific sizes may vary depending on the tire and wheel manufacturer, this reference provides a basic idea of how a tire might fit on a particular wheel size.

Wheel Width Minimum Tire Width Ideal Tire Width Maximum Tire Width
5.0 Inches 155 mm 165 or 175 mm 185 mm
5.5 Inches 165 mm 175 or 185 mm 195 mm
6.0 Inches 175 mm 185 or 195 mm 205 mm
6.5 Inches 185 mm 195 or 205 mm 215 mm
7.0 Inches 195 mm 205 or 215 mm 225 mm
7.5 Inches 205 mm 215 or 225 mm 235 mm
8.0 Inches 215 mm 225 or 235 mm 245 mm
8.5 Inches 225 mm 235 or 245 mm 255 mm
9.0 Inches 235 mm 245 or 255 mm 265 mm
9.5 Inches 245 mm 255 or 265 mm 275 mm
10.0 Inches 255 mm 265 or 275 mm 285 mm
10.5 Inches 265 mm 275 or 285 mm 295 mm
11.0 Inches 275 mm 285 or 295 mm 305 mm
11.5 Inches 285 mm 295 or 305 mm 315 mm
12.0 Inches 295 mm 305 or 315 mm 325 mm
12.5 Inches 305 mm 315 or 325 mm 335 mm

Guidelines for Tire and Wheel Compatibility

Maintain Consistent Tire Diameter:
Always use tires with an external diameter that matches or is slightly smaller than the original specifications.

Speedometer Accuracy:
Ensure the speedometer does not show a speed lower than the actual speed. Between 25 and 75 mph, it is acceptable for the speedometer to display up to 10% higher than the actual speed.

Load Capacity:
Choose tires with a load index equal to or higher than the original tires to ensure proper weight support.

Speed Rating:
Use tires with a speed rating equal to or greater than the original tires. Exceptions apply to winter tires—refer to specific regulations for details.

Wheel Compatibility:
Confirm that the wheel width and diameter are appropriate for the selected tire size.

Special Considerations for SUVs and ABS/ASR Systems:
For vehicles with anti-lock braking systems (ABS) or anti-slip systems (ASR), ensure that front and rear tire dimensions are compatible. The rolling circumference (distance traveled per rotation) must align to avoid performance issues.

Avoid Mechanical Interference:
Verify that any changes in tire or wheel dimensions will not cause mechanical issues, such as insufficient clearance or protrusion beyond the vehicle body.