Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/65-17 | 245/45-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.54 (750.3) | 28.68 (728.5) | -0.86 (-21.8) -2.9% |
| Width inches (mm) | 9.65 (245) | 9.65 (245) | 0 (0) 0% |
| Circum. inches (mm) | 92.8 (2357.14) | 90.1 (2288.65) | -2.7 (-68.49) -2.9% |
| Sidewall Height inches (mm) | 6.27 (159.25) | 4.34 (110.25) | -1.93 (-49) -30.8% |
| Revolutions per mile (km) | 682.75 (424.24) | 703.18 (436.94) | 20.43 (12.7) 3% |
245/45-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.42 mph (31.25 km/h) |
| 25 mph (40.23 km/h) | 24.27 mph (39.06 km/h) |
| 30 mph (48.28 km/h) | 29.13 mph (46.88 km/h) |
| 35 mph (56.33 km/h) | 33.98 mph (54.69 km/h) |
| 40 mph (64.37 km/h) | 38.84 mph (62.5 km/h) |
| 45 mph (72.42 km/h) | 43.69 mph (70.32 km/h) |
| 50 mph (80.47 km/h) | 48.55 mph (78.13 km/h) |
| 55 mph (88.51 km/h) | 53.4 mph (85.94 km/h) |
| 60 mph (96.56 km/h) | 58.26 mph (93.76 km/h) |
| 65 mph (104.61 km/h) | 63.11 mph (101.57 km/h) |
| 70 mph (112.65 km/h) | 67.97 mph (109.38 km/h) |
| 75 mph (120.7 km/h) | 72.82 mph (117.19 km/h) |
| 80 mph (128.75 km/h) | 77.68 mph (125.01 km/h) |
| 85 mph (136.79 km/h) | 82.53 mph (132.82 km/h) |
| 90 mph (144.84 km/h) | 87.39 mph (140.63 km/h) |
| 95 mph (152.89 km/h) | 92.24 mph (148.45 km/h) |
| 100 mph (160.93 km/h) | 97.09 mph (156.26 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1789 | 2079 | 2239 | 2338 | 2444 | 2520 | 2604 | 2703 | 2840 | 2977 | 3130 | 3252 | 3472 | 3716 | 3906 | 4028 | 4097 | 4348 | 4698 | 5460 |
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