Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/40-10 | 270/30-14 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 17.09 (434) | 20.38 (517.6) | 3.29 (83.6) 19.3% |
| Width inches (mm) | 8.86 (225) | 10.63 (270) | 1.77 (45) 20% |
| Circum. inches (mm) | 53.68 (1363.45) | 64.02 (1626.09) | 10.34 (262.64) 19.3% |
| Sidewall Height inches (mm) | 3.54 (90) | 3.19 (81) | -0.35 (-9) -10% |
| Revolutions per mile (km) | 1180.35 (733.43) | 989.7 (614.97) | -190.64 (-118.46) -16.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.85 mph (38.39 km/h) |
| 25 mph (40.23 km/h) | 29.82 mph (47.98 km/h) |
| 30 mph (48.28 km/h) | 35.78 mph (57.58 km/h) |
| 35 mph (56.33 km/h) | 41.74 mph (67.18 km/h) |
| 40 mph (64.37 km/h) | 47.71 mph (76.77 km/h) |
| 45 mph (72.42 km/h) | 53.67 mph (86.37 km/h) |
| 50 mph (80.47 km/h) | 59.63 mph (95.97 km/h) |
| 55 mph (88.51 km/h) | 65.59 mph (105.56 km/h) |
| 60 mph (96.56 km/h) | 71.56 mph (115.16 km/h) |
| 65 mph (104.61 km/h) | 77.52 mph (124.76 km/h) |
| 70 mph (112.65 km/h) | 83.48 mph (134.35 km/h) |
| 75 mph (120.7 km/h) | 89.45 mph (143.95 km/h) |
| 80 mph (128.75 km/h) | 95.41 mph (153.55 km/h) |
| 85 mph (136.79 km/h) | 101.37 mph (163.14 km/h) |
| 90 mph (144.84 km/h) | 107.34 mph (172.74 km/h) |
| 95 mph (152.89 km/h) | 113.3 mph (182.34 km/h) |
| 100 mph (160.93 km/h) | 119.26 mph (191.94 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
