Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/45-22 | 305/45-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.81 (833.3) | 30.81 (782.5) | -2 (-50.8) -6.1% |
| Width inches (mm) | 12.01 (305) | 12.01 (305) | 0 (0) 0% |
| Circum. inches (mm) | 103.07 (2617.89) | 96.78 (2458.3) | -6.28 (-159.59) -6.1% |
| Sidewall Height inches (mm) | 5.4 (137.25) | 5.4 (137.25) | 0 (0) 0% |
| Revolutions per mile (km) | 614.75 (381.99) | 654.66 (406.79) | 39.91 (24.8) 6.5% |
305/45-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.78 mph (30.22 km/h) |
| 25 mph (40.23 km/h) | 23.48 mph (37.78 km/h) |
| 30 mph (48.28 km/h) | 28.17 mph (45.34 km/h) |
| 35 mph (56.33 km/h) | 32.87 mph (52.89 km/h) |
| 40 mph (64.37 km/h) | 37.56 mph (60.45 km/h) |
| 45 mph (72.42 km/h) | 42.26 mph (68.01 km/h) |
| 50 mph (80.47 km/h) | 46.95 mph (75.56 km/h) |
| 55 mph (88.51 km/h) | 51.65 mph (83.12 km/h) |
| 60 mph (96.56 km/h) | 56.34 mph (90.67 km/h) |
| 65 mph (104.61 km/h) | 61.04 mph (98.23 km/h) |
| 70 mph (112.65 km/h) | 65.73 mph (105.79 km/h) |
| 75 mph (120.7 km/h) | 70.43 mph (113.34 km/h) |
| 80 mph (128.75 km/h) | 75.12 mph (120.9 km/h) |
| 85 mph (136.79 km/h) | 79.82 mph (128.46 km/h) |
| 90 mph (144.84 km/h) | 84.51 mph (136.01 km/h) |
| 95 mph (152.89 km/h) | 89.21 mph (143.57 km/h) |
| 100 mph (160.93 km/h) | 93.9 mph (151.12 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1666 | 1935 | 2084 | 2176 | 2276 | 2347 | 2425 | 2517 | 2644 | 2772 | 2914 | 3027 | 3233 | 3460 | 3637 | 3750 | 3814 | 4048 | 4374 | 5083 |
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