Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/70-16 | 255/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.4 (721.4) | 32.06 (814.2) | 3.65 (92.8) 12.9% |
| Width inches (mm) | 8.86 (225) | 10.04 (255) | 1.18 (30) 13.3% |
| Circum. inches (mm) | 89.23 (2266.34) | 100.7 (2557.88) | 11.48 (291.54) 12.9% |
| Sidewall Height inches (mm) | 6.2 (157.5) | 7.03 (178.5) | 0.83 (21) 13.3% |
| Revolutions per mile (km) | 710.11 (441.24) | 629.17 (390.95) | -80.94 (-50.29) -11.4% |
255/70-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.57 mph (36.33 km/h) |
| 25 mph (40.23 km/h) | 28.22 mph (45.41 km/h) |
| 30 mph (48.28 km/h) | 33.86 mph (54.49 km/h) |
| 35 mph (56.33 km/h) | 39.5 mph (63.57 km/h) |
| 40 mph (64.37 km/h) | 45.15 mph (72.65 km/h) |
| 45 mph (72.42 km/h) | 50.79 mph (81.74 km/h) |
| 50 mph (80.47 km/h) | 56.43 mph (90.82 km/h) |
| 55 mph (88.51 km/h) | 62.08 mph (99.9 km/h) |
| 60 mph (96.56 km/h) | 67.72 mph (108.98 km/h) |
| 65 mph (104.61 km/h) | 73.36 mph (118.06 km/h) |
| 70 mph (112.65 km/h) | 79 mph (127.15 km/h) |
| 75 mph (120.7 km/h) | 84.65 mph (136.23 km/h) |
| 80 mph (128.75 km/h) | 90.29 mph (145.31 km/h) |
| 85 mph (136.79 km/h) | 95.93 mph (154.39 km/h) |
| 90 mph (144.84 km/h) | 101.58 mph (163.47 km/h) |
| 95 mph (152.89 km/h) | 107.22 mph (172.56 km/h) |
| 100 mph (160.93 km/h) | 112.86 mph (181.64 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1601 | 1860 | 2003 | 2092 | 2187 | 2255 | 2330 | 2419 | 2541 | 2664 | 2800 | 2909 | 3107 | 3325 | 3495 | 3604 | 3666 | 3890 | 4204 | 4885 |
Better Fuel Economy Factory Ratios Increased Power
