Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 215/30-20 | 230/30-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.08 (637) | 25.43 (646) | 0.35 (9) 1.4% |
| Width inches (mm) | 8.46 (215) | 9.06 (230) | 0.59 (15) 7% |
| Circum. inches (mm) | 78.79 (2001.19) | 79.9 (2029.47) | 1.11 (28.27) 1.4% |
| Sidewall Height inches (mm) | 2.54 (64.5) | 2.72 (69) | 0.18 (4.5) 7% |
| Revolutions per mile (km) | 804.19 (499.7) | 792.99 (492.74) | -11.2 (-6.96) -1.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.28 mph (32.64 km/h) |
| 25 mph (40.23 km/h) | 25.35 mph (40.8 km/h) |
| 30 mph (48.28 km/h) | 30.42 mph (48.96 km/h) |
| 35 mph (56.33 km/h) | 35.49 mph (57.12 km/h) |
| 40 mph (64.37 km/h) | 40.57 mph (65.28 km/h) |
| 45 mph (72.42 km/h) | 45.64 mph (73.44 km/h) |
| 50 mph (80.47 km/h) | 50.71 mph (81.6 km/h) |
| 55 mph (88.51 km/h) | 55.78 mph (89.76 km/h) |
| 60 mph (96.56 km/h) | 60.85 mph (97.93 km/h) |
| 65 mph (104.61 km/h) | 65.92 mph (106.09 km/h) |
| 70 mph (112.65 km/h) | 70.99 mph (114.25 km/h) |
| 75 mph (120.7 km/h) | 76.06 mph (122.41 km/h) |
| 80 mph (128.75 km/h) | 81.13 mph (130.57 km/h) |
| 85 mph (136.79 km/h) | 86.2 mph (138.73 km/h) |
| 90 mph (144.84 km/h) | 91.27 mph (146.89 km/h) |
| 95 mph (152.89 km/h) | 96.34 mph (155.05 km/h) |
| 100 mph (160.93 km/h) | 101.41 mph (163.21 km/h) |
| 2.35 | 2.73 | 2.94 | 3.07 | 3.21 | 3.31 | 3.42 | 3.55 | 3.73 | 3.91 | 4.11 | 4.27 | 4.56 | 4.88 | 5.13 | 5.29 | 5.38 | 5.71 | 6.17 | 7.17 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2018 | 2344 | 2525 | 2636 | 2757 | 2842 | 2937 | 3048 | 3203 | 3358 | 3529 | 3667 | 3916 | 4191 | 4405 | 4543 | 4620 | 4903 | 5298 | 6157 |
Better Fuel Economy Factory Ratios Increased Power
