Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/60-20 | 245/40-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 31.57 (802) | 27.72 (704) | -3.86 (-98) -12.2% |
| Width inches (mm) | 9.65 (245) | 9.65 (245) | 0 (0) 0% |
| Circum. inches (mm) | 99.2 (2519.56) | 87.07 (2211.68) | -12.12 (-307.88) -12.2% |
| Sidewall Height inches (mm) | 5.79 (147) | 3.86 (98) | -1.93 (-49) -33.3% |
| Revolutions per mile (km) | 638.74 (396.89) | 727.66 (452.14) | 88.92 (55.25) 13.9% |
245/40-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 17.56 mph (28.25 km/h) |
| 25 mph (40.23 km/h) | 21.95 mph (35.32 km/h) |
| 30 mph (48.28 km/h) | 26.33 mph (42.38 km/h) |
| 35 mph (56.33 km/h) | 30.72 mph (49.44 km/h) |
| 40 mph (64.37 km/h) | 35.11 mph (56.51 km/h) |
| 45 mph (72.42 km/h) | 39.5 mph (63.57 km/h) |
| 50 mph (80.47 km/h) | 43.89 mph (70.63 km/h) |
| 55 mph (88.51 km/h) | 48.28 mph (77.7 km/h) |
| 60 mph (96.56 km/h) | 52.67 mph (84.76 km/h) |
| 65 mph (104.61 km/h) | 57.06 mph (91.83 km/h) |
| 70 mph (112.65 km/h) | 61.45 mph (98.89 km/h) |
| 75 mph (120.7 km/h) | 65.84 mph (105.95 km/h) |
| 80 mph (128.75 km/h) | 70.22 mph (113.02 km/h) |
| 85 mph (136.79 km/h) | 74.61 mph (120.08 km/h) |
| 90 mph (144.84 km/h) | 79 mph (127.14 km/h) |
| 95 mph (152.89 km/h) | 83.39 mph (134.21 km/h) |
| 100 mph (160.93 km/h) | 87.78 mph (141.27 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1852 | 2151 | 2317 | 2419 | 2529 | 2608 | 2695 | 2797 | 2939 | 3081 | 3239 | 3365 | 3593 | 3845 | 4042 | 4168 | 4239 | 4499 | 4862 | 5650 |
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