Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/65-18 | 270/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.52 (749.7) | 32.88 (835.2) | 3.37 (85.5) 11.4% |
| Width inches (mm) | 8.86 (225) | 10.63 (270) | 1.77 (45) 20% |
| Circum. inches (mm) | 92.73 (2355.25) | 103.3 (2623.86) | 10.58 (268.61) 11.4% |
| Sidewall Height inches (mm) | 5.76 (146.25) | 7.44 (189) | 1.68 (42.75) 29.2% |
| Revolutions per mile (km) | 683.3 (424.58) | 613.35 (381.12) | -69.95 (-43.46) -10.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.28 mph (35.86 km/h) |
| 25 mph (40.23 km/h) | 27.85 mph (44.82 km/h) |
| 30 mph (48.28 km/h) | 33.42 mph (53.79 km/h) |
| 35 mph (56.33 km/h) | 38.99 mph (62.75 km/h) |
| 40 mph (64.37 km/h) | 44.56 mph (71.72 km/h) |
| 45 mph (72.42 km/h) | 50.13 mph (80.68 km/h) |
| 50 mph (80.47 km/h) | 55.7 mph (89.64 km/h) |
| 55 mph (88.51 km/h) | 61.27 mph (98.61 km/h) |
| 60 mph (96.56 km/h) | 66.84 mph (107.57 km/h) |
| 65 mph (104.61 km/h) | 72.41 mph (116.54 km/h) |
| 70 mph (112.65 km/h) | 77.98 mph (125.5 km/h) |
| 75 mph (120.7 km/h) | 83.55 mph (134.47 km/h) |
| 80 mph (128.75 km/h) | 89.12 mph (143.43 km/h) |
| 85 mph (136.79 km/h) | 94.69 mph (152.4 km/h) |
| 90 mph (144.84 km/h) | 100.26 mph (161.36 km/h) |
| 95 mph (152.89 km/h) | 105.83 mph (170.32 km/h) |
| 100 mph (160.93 km/h) | 111.4 mph (179.29 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1561 | 1813 | 1953 | 2039 | 2132 | 2198 | 2272 | 2358 | 2477 | 2597 | 2730 | 2836 | 3029 | 3241 | 3407 | 3514 | 3573 | 3793 | 4098 | 4762 |
Better Fuel Economy Factory Ratios Increased Power
