Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/40-18 | 245/40-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.66 (677.2) | 25.72 (653.2) | -0.94 (-24) -3.5% |
| Width inches (mm) | 10.83 (275) | 9.65 (245) | -1.18 (-30) -10.9% |
| Circum. inches (mm) | 83.76 (2127.49) | 80.79 (2052.09) | -2.97 (-75.4) -3.5% |
| Sidewall Height inches (mm) | 4.33 (110) | 3.86 (98) | -0.47 (-12) -10.9% |
| Revolutions per mile (km) | 756.45 (470.04) | 784.25 (487.31) | 27.79 (17.27) 3.7% |
245/40-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.29 mph (31.05 km/h) |
| 25 mph (40.23 km/h) | 24.11 mph (38.81 km/h) |
| 30 mph (48.28 km/h) | 28.94 mph (46.57 km/h) |
| 35 mph (56.33 km/h) | 33.76 mph (54.33 km/h) |
| 40 mph (64.37 km/h) | 38.58 mph (62.09 km/h) |
| 45 mph (72.42 km/h) | 43.41 mph (69.85 km/h) |
| 50 mph (80.47 km/h) | 48.23 mph (77.62 km/h) |
| 55 mph (88.51 km/h) | 53.05 mph (85.38 km/h) |
| 60 mph (96.56 km/h) | 57.87 mph (93.14 km/h) |
| 65 mph (104.61 km/h) | 62.7 mph (100.9 km/h) |
| 70 mph (112.65 km/h) | 67.52 mph (108.66 km/h) |
| 75 mph (120.7 km/h) | 72.34 mph (116.42 km/h) |
| 80 mph (128.75 km/h) | 77.16 mph (124.18 km/h) |
| 85 mph (136.79 km/h) | 81.99 mph (131.95 km/h) |
| 90 mph (144.84 km/h) | 86.81 mph (139.71 km/h) |
| 95 mph (152.89 km/h) | 91.63 mph (147.47 km/h) |
| 100 mph (160.93 km/h) | 96.46 mph (155.23 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1996 | 2318 | 2497 | 2607 | 2726 | 2811 | 2904 | 3015 | 3168 | 3321 | 3490 | 3626 | 3873 | 4144 | 4357 | 4493 | 4569 | 4849 | 5240 | 6089 |
Better Fuel Economy Factory Ratios Increased Power
