Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/35-18 | 245/40-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.48 (621.7) | 25.72 (653.2) | 1.24 (31.5) 5.1% |
| Width inches (mm) | 9.25 (235) | 9.65 (245) | 0.39 (10) 4.3% |
| Circum. inches (mm) | 76.89 (1953.13) | 80.79 (2052.09) | 3.9 (98.96) 5.1% |
| Sidewall Height inches (mm) | 3.24 (82.25) | 3.86 (98) | 0.62 (15.75) 19.1% |
| Revolutions per mile (km) | 823.98 (512) | 784.25 (487.31) | -39.74 (-24.69) -4.8% |
245/40-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.01 mph (33.82 km/h) |
| 25 mph (40.23 km/h) | 26.27 mph (42.27 km/h) |
| 30 mph (48.28 km/h) | 31.52 mph (50.73 km/h) |
| 35 mph (56.33 km/h) | 36.77 mph (59.18 km/h) |
| 40 mph (64.37 km/h) | 42.03 mph (67.64 km/h) |
| 45 mph (72.42 km/h) | 47.28 mph (76.09 km/h) |
| 50 mph (80.47 km/h) | 52.53 mph (84.54 km/h) |
| 55 mph (88.51 km/h) | 57.79 mph (93 km/h) |
| 60 mph (96.56 km/h) | 63.04 mph (101.45 km/h) |
| 65 mph (104.61 km/h) | 68.29 mph (109.91 km/h) |
| 70 mph (112.65 km/h) | 73.55 mph (118.36 km/h) |
| 75 mph (120.7 km/h) | 78.8 mph (126.82 km/h) |
| 80 mph (128.75 km/h) | 84.05 mph (135.27 km/h) |
| 85 mph (136.79 km/h) | 89.31 mph (143.73 km/h) |
| 90 mph (144.84 km/h) | 94.56 mph (152.18 km/h) |
| 95 mph (152.89 km/h) | 99.81 mph (160.63 km/h) |
| 100 mph (160.93 km/h) | 105.07 mph (169.09 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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