Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 125/60-18 | 245/40-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 23.91 (607.2) | 25.72 (653.2) | 1.81 (46) 7.6% |
| Width inches (mm) | 4.92 (125) | 9.65 (245) | 4.72 (120) 96% |
| Circum. inches (mm) | 75.1 (1907.58) | 80.79 (2052.09) | 5.69 (144.51) 7.6% |
| Sidewall Height inches (mm) | 2.95 (75) | 3.86 (98) | 0.91 (23) 30.7% |
| Revolutions per mile (km) | 843.66 (524.22) | 784.25 (487.31) | -59.41 (-36.92) -7% |
245/40-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.52 mph (34.63 km/h) |
| 25 mph (40.23 km/h) | 26.89 mph (43.28 km/h) |
| 30 mph (48.28 km/h) | 32.27 mph (51.94 km/h) |
| 35 mph (56.33 km/h) | 37.65 mph (60.59 km/h) |
| 40 mph (64.37 km/h) | 43.03 mph (69.25 km/h) |
| 45 mph (72.42 km/h) | 48.41 mph (77.91 km/h) |
| 50 mph (80.47 km/h) | 53.79 mph (86.56 km/h) |
| 55 mph (88.51 km/h) | 59.17 mph (95.22 km/h) |
| 60 mph (96.56 km/h) | 64.55 mph (103.88 km/h) |
| 65 mph (104.61 km/h) | 69.92 mph (112.53 km/h) |
| 70 mph (112.65 km/h) | 75.3 mph (121.19 km/h) |
| 75 mph (120.7 km/h) | 80.68 mph (129.85 km/h) |
| 80 mph (128.75 km/h) | 86.06 mph (138.5 km/h) |
| 85 mph (136.79 km/h) | 91.44 mph (147.16 km/h) |
| 90 mph (144.84 km/h) | 96.82 mph (155.81 km/h) |
| 95 mph (152.89 km/h) | 102.2 mph (164.47 km/h) |
| 100 mph (160.93 km/h) | 107.58 mph (173.13 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 |
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