Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 345/35-18 | 245/40-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.51 (698.7) | 25.72 (653.2) | -1.79 (-45.5) -6.5% |
| Width inches (mm) | 13.58 (345) | 9.65 (245) | -3.94 (-100) -29% |
| Circum. inches (mm) | 86.42 (2195.03) | 80.79 (2052.09) | -5.63 (-142.94) -6.5% |
| Sidewall Height inches (mm) | 4.75 (120.75) | 3.86 (98) | -0.9 (-22.75) -18.8% |
| Revolutions per mile (km) | 733.18 (455.57) | 784.25 (487.31) | 51.07 (31.73) 7% |
245/40-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.7 mph (30.09 km/h) |
| 25 mph (40.23 km/h) | 23.37 mph (37.61 km/h) |
| 30 mph (48.28 km/h) | 28.05 mph (45.14 km/h) |
| 35 mph (56.33 km/h) | 32.72 mph (52.66 km/h) |
| 40 mph (64.37 km/h) | 37.4 mph (60.18 km/h) |
| 45 mph (72.42 km/h) | 42.07 mph (67.7 km/h) |
| 50 mph (80.47 km/h) | 46.74 mph (75.23 km/h) |
| 55 mph (88.51 km/h) | 51.42 mph (82.75 km/h) |
| 60 mph (96.56 km/h) | 56.09 mph (90.27 km/h) |
| 65 mph (104.61 km/h) | 60.77 mph (97.8 km/h) |
| 70 mph (112.65 km/h) | 65.44 mph (105.32 km/h) |
| 75 mph (120.7 km/h) | 70.12 mph (112.84 km/h) |
| 80 mph (128.75 km/h) | 74.79 mph (120.36 km/h) |
| 85 mph (136.79 km/h) | 79.46 mph (127.89 km/h) |
| 90 mph (144.84 km/h) | 84.14 mph (135.41 km/h) |
| 95 mph (152.89 km/h) | 88.81 mph (142.93 km/h) |
| 100 mph (160.93 km/h) | 93.49 mph (150.45 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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