Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 365/70-22.5 | 420/70-24 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 42.62 (1082.5) | 47.15 (1197.6) | 4.53 (115.1) 10.6% |
| Width inches (mm) | 14.37 (365) | 16.54 (420) | 2.17 (55) 15.1% |
| Circum. inches (mm) | 133.89 (3400.77) | 148.12 (3762.37) | 14.24 (361.6) 10.6% |
| Sidewall Height inches (mm) | 10.06 (255.5) | 11.57 (294) | 1.52 (38.5) 15.1% |
| Revolutions per mile (km) | 473.23 (294.05) | 427.75 (265.79) | -45.48 (-28.26) -9.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.13 mph (35.61 km/h) |
| 25 mph (40.23 km/h) | 27.66 mph (44.51 km/h) |
| 30 mph (48.28 km/h) | 33.19 mph (53.41 km/h) |
| 35 mph (56.33 km/h) | 38.72 mph (62.32 km/h) |
| 40 mph (64.37 km/h) | 44.25 mph (71.22 km/h) |
| 45 mph (72.42 km/h) | 49.78 mph (80.12 km/h) |
| 50 mph (80.47 km/h) | 55.32 mph (89.02 km/h) |
| 55 mph (88.51 km/h) | 60.85 mph (97.93 km/h) |
| 60 mph (96.56 km/h) | 66.38 mph (106.83 km/h) |
| 65 mph (104.61 km/h) | 71.91 mph (115.73 km/h) |
| 70 mph (112.65 km/h) | 77.44 mph (124.63 km/h) |
| 75 mph (120.7 km/h) | 82.97 mph (133.53 km/h) |
| 80 mph (128.75 km/h) | 88.51 mph (142.44 km/h) |
| 85 mph (136.79 km/h) | 94.04 mph (151.34 km/h) |
| 90 mph (144.84 km/h) | 99.57 mph (160.24 km/h) |
| 95 mph (152.89 km/h) | 105.1 mph (169.14 km/h) |
| 100 mph (160.93 km/h) | 110.63 mph (178.05 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Better Fuel Economy Factory Ratios Increased Power
