345/30R20 — what does it mean?
- 345 stands for tread width in millimeters
- 30 is an aspect ration between the tread width and the sidewall in percents
- R means that the tire has a radial construction
- 20 is a wheel diameter (or rim) in inches
How to convert 345 30R20 to inches?
First of all, we need to divide 345 mm (width) by 25.4 (mm to inch conversion), which will give us a width of 13.6″. Then, 30% of the 13.6″ will result in 4.1″ sidewall.
To get the total height or tire diameter, we need to sum the 20″ rim diameter with two of the sidewall heights. It will result in a 28.2″ total tire diameter (or height).
For your convenience, below is a table for 345/30R20 conversion to inches:
| Inches | Metric | |
|---|---|---|
| Overall diameter (height) | 28.2″ | 716 mm |
| Tread width | 13.6″ | 345 mm |
| Wheel diameter | 20″ | 716 mm |
| Sidewall height | 4.1″ | 104 mm |
| Circumference | 88.5″ | 2248 mm |
| Revolutions | 716 / ml | 445 / km |
Alternatives to a 345/30R20 tire
If you're looking to upsize your 345 30R20 tires, try to stay within 3% deviation of an overall diameter for safety reasons.
| Tire | Tire diameter | Width | Wheel Size |
|---|---|---|---|
| 305/35R20 | 28.4″ 0.17% | 12″ | 20″ |
| 275/40R20 | 28.6″ 0.35% | 10.8″ | 20″ |
| 315/35R20 | 28.6″ 0.35% | 12.4″ | 20″ |
| 285/40R20 | 29″ 0.72% | 11.2″ | 20″ |
| 245/40R20 | 27.8″ -0.35% | 9.6″ | 20″ |
| 295/35R20 | 28.2″ 0% | 11.6″ | 20″ |
| 285/35R20 | 27.8″ -0.35% | 11.2″ | 20″ |
| 275/35R20 | 27.6″ -0.53% | 10.8″ | 20″ |
| 155/65R20 | 28″ -0.18% | 6.1″ | 20″ |
| 195/50R20 | 27.8″ -0.35% | 7.7″ | 20″ |