Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/40-18 | 255/40-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.03 (661.2) | 25.03 (635.8) | -1 (-25.4) -3.8% |
| Width inches (mm) | 10.04 (255) | 10.04 (255) | 0 (0) 0% |
| Circum. inches (mm) | 81.78 (2077.22) | 78.64 (1997.42) | -3.14 (-79.8) -3.8% |
| Sidewall Height inches (mm) | 4.02 (102) | 4.02 (102) | 0 (0) 0% |
| Revolutions per mile (km) | 774.76 (481.41) | 805.71 (500.64) | 30.95 (19.23) 4% |
255/40-17 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.23 mph (30.95 km/h) |
| 25 mph (40.23 km/h) | 24.04 mph (38.69 km/h) |
| 30 mph (48.28 km/h) | 28.85 mph (46.43 km/h) |
| 35 mph (56.33 km/h) | 33.66 mph (54.16 km/h) |
| 40 mph (64.37 km/h) | 38.46 mph (61.9 km/h) |
| 45 mph (72.42 km/h) | 43.27 mph (69.64 km/h) |
| 50 mph (80.47 km/h) | 48.08 mph (77.38 km/h) |
| 55 mph (88.51 km/h) | 52.89 mph (85.11 km/h) |
| 60 mph (96.56 km/h) | 57.7 mph (92.85 km/h) |
| 65 mph (104.61 km/h) | 62.5 mph (100.59 km/h) |
| 70 mph (112.65 km/h) | 67.31 mph (108.33 km/h) |
| 75 mph (120.7 km/h) | 72.12 mph (116.06 km/h) |
| 80 mph (128.75 km/h) | 76.93 mph (123.8 km/h) |
| 85 mph (136.79 km/h) | 81.73 mph (131.54 km/h) |
| 90 mph (144.84 km/h) | 86.54 mph (139.28 km/h) |
| 95 mph (152.89 km/h) | 91.35 mph (147.01 km/h) |
| 100 mph (160.93 km/h) | 96.16 mph (154.75 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2050 | 2382 | 2565 | 2679 | 2801 | 2888 | 2984 | 3097 | 3254 | 3411 | 3586 | 3726 | 3979 | 4258 | 4476 | 4616 | 4694 | 4982 | 5383 | 6256 |
Better Fuel Economy Factory Ratios Increased Power
