Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 265/45-20 | 255/55-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.39 (746.5) | 31.04 (788.5) | 1.65 (42) 5.6% |
| Width inches (mm) | 10.43 (265) | 10.04 (255) | -0.39 (-10) -3.8% |
| Circum. inches (mm) | 92.33 (2345.2) | 97.53 (2477.15) | 5.19 (131.95) 5.6% |
| Sidewall Height inches (mm) | 4.69 (119.25) | 5.52 (140.25) | 0.83 (21) 17.6% |
| Revolutions per mile (km) | 686.23 (426.4) | 649.68 (403.69) | -36.55 (-22.71) -5.3% |
255/55-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.13 mph (34 km/h) |
| 25 mph (40.23 km/h) | 26.41 mph (42.5 km/h) |
| 30 mph (48.28 km/h) | 31.69 mph (51 km/h) |
| 35 mph (56.33 km/h) | 36.97 mph (59.5 km/h) |
| 40 mph (64.37 km/h) | 42.25 mph (68 km/h) |
| 45 mph (72.42 km/h) | 47.53 mph (76.5 km/h) |
| 50 mph (80.47 km/h) | 52.81 mph (84.99 km/h) |
| 55 mph (88.51 km/h) | 58.09 mph (93.49 km/h) |
| 60 mph (96.56 km/h) | 63.38 mph (101.99 km/h) |
| 65 mph (104.61 km/h) | 68.66 mph (110.49 km/h) |
| 70 mph (112.65 km/h) | 73.94 mph (118.99 km/h) |
| 75 mph (120.7 km/h) | 79.22 mph (127.49 km/h) |
| 80 mph (128.75 km/h) | 84.5 mph (135.99 km/h) |
| 85 mph (136.79 km/h) | 89.78 mph (144.49 km/h) |
| 90 mph (144.84 km/h) | 95.06 mph (152.99 km/h) |
| 95 mph (152.89 km/h) | 100.34 mph (161.49 km/h) |
| 100 mph (160.93 km/h) | 105.63 mph (169.99 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1653 | 1921 | 2068 | 2160 | 2258 | 2329 | 2406 | 2498 | 2624 | 2751 | 2892 | 3004 | 3208 | 3433 | 3609 | 3722 | 3785 | 4017 | 4341 | 5044 |
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