Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 265/45-20 | 245/40-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.39 (746.5) | 27.72 (704) | -1.67 (-42.5) -5.7% |
| Width inches (mm) | 10.43 (265) | 9.65 (245) | -0.79 (-20) -7.5% |
| Circum. inches (mm) | 92.33 (2345.2) | 87.07 (2211.68) | -5.26 (-133.52) -5.7% |
| Sidewall Height inches (mm) | 4.69 (119.25) | 3.86 (98) | -0.84 (-21.25) -17.8% |
| Revolutions per mile (km) | 686.23 (426.4) | 727.66 (452.14) | 41.43 (25.74) 6% |
245/40-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.86 mph (30.35 km/h) |
| 25 mph (40.23 km/h) | 23.58 mph (37.94 km/h) |
| 30 mph (48.28 km/h) | 28.29 mph (45.53 km/h) |
| 35 mph (56.33 km/h) | 33.01 mph (53.12 km/h) |
| 40 mph (64.37 km/h) | 37.72 mph (60.71 km/h) |
| 45 mph (72.42 km/h) | 42.44 mph (68.3 km/h) |
| 50 mph (80.47 km/h) | 47.15 mph (75.89 km/h) |
| 55 mph (88.51 km/h) | 51.87 mph (83.47 km/h) |
| 60 mph (96.56 km/h) | 56.58 mph (91.06 km/h) |
| 65 mph (104.61 km/h) | 61.3 mph (98.65 km/h) |
| 70 mph (112.65 km/h) | 66.01 mph (106.24 km/h) |
| 75 mph (120.7 km/h) | 70.73 mph (113.83 km/h) |
| 80 mph (128.75 km/h) | 75.45 mph (121.42 km/h) |
| 85 mph (136.79 km/h) | 80.16 mph (129.01 km/h) |
| 90 mph (144.84 km/h) | 84.88 mph (136.6 km/h) |
| 95 mph (152.89 km/h) | 89.59 mph (144.18 km/h) |
| 100 mph (160.93 km/h) | 94.31 mph (151.77 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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