Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/35-18 | 245/40-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.2 (614.7) | 25.72 (653.2) | 1.52 (38.5) 6.3% |
| Width inches (mm) | 8.86 (225) | 9.65 (245) | 0.79 (20) 8.9% |
| Circum. inches (mm) | 76.03 (1931.14) | 80.79 (2052.09) | 4.76 (120.95) 6.3% |
| Sidewall Height inches (mm) | 3.1 (78.75) | 3.86 (98) | 0.76 (19.25) 24.4% |
| Revolutions per mile (km) | 833.37 (517.83) | 784.25 (487.31) | -49.12 (-30.52) -5.9% |
245/40-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.25 mph (34.2 km/h) |
| 25 mph (40.23 km/h) | 26.57 mph (42.75 km/h) |
| 30 mph (48.28 km/h) | 31.88 mph (51.3 km/h) |
| 35 mph (56.33 km/h) | 37.19 mph (59.86 km/h) |
| 40 mph (64.37 km/h) | 42.51 mph (68.41 km/h) |
| 45 mph (72.42 km/h) | 47.82 mph (76.96 km/h) |
| 50 mph (80.47 km/h) | 53.13 mph (85.51 km/h) |
| 55 mph (88.51 km/h) | 58.44 mph (94.06 km/h) |
| 60 mph (96.56 km/h) | 63.76 mph (102.61 km/h) |
| 65 mph (104.61 km/h) | 69.07 mph (111.16 km/h) |
| 70 mph (112.65 km/h) | 74.38 mph (119.71 km/h) |
| 75 mph (120.7 km/h) | 79.7 mph (128.26 km/h) |
| 80 mph (128.75 km/h) | 85.01 mph (136.81 km/h) |
| 85 mph (136.79 km/h) | 90.32 mph (145.36 km/h) |
| 90 mph (144.84 km/h) | 95.64 mph (153.91 km/h) |
| 95 mph (152.89 km/h) | 100.95 mph (162.46 km/h) |
| 100 mph (160.93 km/h) | 106.26 mph (171.01 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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