Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 205/60-18 | 245/40-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.69 (703.2) | 25.72 (653.2) | -1.97 (-50) -7.1% |
| Width inches (mm) | 8.07 (205) | 9.65 (245) | 1.57 (40) 19.5% |
| Circum. inches (mm) | 86.98 (2209.17) | 80.79 (2052.09) | -6.18 (-157.08) -7.1% |
| Sidewall Height inches (mm) | 4.84 (123) | 3.86 (98) | -0.98 (-25) -20.3% |
| Revolutions per mile (km) | 728.48 (452.66) | 784.25 (487.31) | 55.76 (34.65) 7.7% |
245/40-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.58 mph (29.9 km/h) |
| 25 mph (40.23 km/h) | 23.22 mph (37.37 km/h) |
| 30 mph (48.28 km/h) | 27.87 mph (44.85 km/h) |
| 35 mph (56.33 km/h) | 32.51 mph (52.32 km/h) |
| 40 mph (64.37 km/h) | 37.16 mph (59.8 km/h) |
| 45 mph (72.42 km/h) | 41.8 mph (67.27 km/h) |
| 50 mph (80.47 km/h) | 46.44 mph (74.75 km/h) |
| 55 mph (88.51 km/h) | 51.09 mph (82.22 km/h) |
| 60 mph (96.56 km/h) | 55.73 mph (89.7 km/h) |
| 65 mph (104.61 km/h) | 60.38 mph (97.17 km/h) |
| 70 mph (112.65 km/h) | 65.02 mph (104.64 km/h) |
| 75 mph (120.7 km/h) | 69.67 mph (112.12 km/h) |
| 80 mph (128.75 km/h) | 74.31 mph (119.59 km/h) |
| 85 mph (136.79 km/h) | 78.96 mph (127.07 km/h) |
| 90 mph (144.84 km/h) | 83.6 mph (134.54 km/h) |
| 95 mph (152.89 km/h) | 88.25 mph (142.02 km/h) |
| 100 mph (160.93 km/h) | 92.89 mph (149.49 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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