305/50R18 tire size
305/50R18 in inches: 30.01" overall diameter — 12.01" wide, 6.00" sidewall.
Overall diameter 30.01 in 762.2 mm
Section width 12.01 in 305 mm
Sidewall height 6.00 in 152.5 mm
Revs / mile 672 speedo calibration
Full dimensions
| Measurement | Metric | Imperial |
|---|---|---|
| Overall diameter | 762.2 mm | 30.01 in |
| Section width | 305 mm | 12.01 in |
| Sidewall height | 152.5 mm | 6.00 in |
| Rim diameter | 457.2 mm | 18 in |
| Circumference | 2394.5 mm | 94.27 in |
| Revolutions per mile | 672.1 | |
| Aspect ratio | 50% | |
Compare 305/50R18 to similar sizes
Frequently asked questions
What is the overall diameter of a 305/50R18 tire?
A 305/50R18 tire has an overall diameter of 30.01 inches (762.2 mm).
How tall is a 305/50R18 tire?
The sidewall height is 152.5 mm (6.00 inches), and the overall diameter from the ground to the top of the tire is 30.01 inches.
How many revolutions per mile does a 305/50R18 tire make?
A 305/50R18 tire makes approximately 672 revolutions per mile. Your speedometer is calibrated to this number.
What rim size does a 305/50R18 tire fit?
A 305/50R18 tire is designed for a 18-inch rim (457.2 mm).
All dimensions calculated using standard ETRTO formulas. Always confirm fitment with your vehicle's door-placard and a qualified tire professional before purchasing.