Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 295/65-20 | 305/55-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 35.1 (891.5) | 33.21 (843.5) | -1.89 (-48) -5.4% |
| Width inches (mm) | 11.61 (295) | 12.01 (305) | 0.39 (10) 3.4% |
| Circum. inches (mm) | 110.26 (2800.73) | 104.33 (2649.93) | -5.94 (-150.8) -5.4% |
| Sidewall Height inches (mm) | 7.55 (191.75) | 6.6 (167.75) | -0.94 (-24) -12.5% |
| Revolutions per mile (km) | 574.62 (357.05) | 607.31 (377.37) | 32.7 (20.32) 5.7% |
305/55-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.92 mph (30.45 km/h) |
| 25 mph (40.23 km/h) | 23.65 mph (38.07 km/h) |
| 30 mph (48.28 km/h) | 28.38 mph (45.68 km/h) |
| 35 mph (56.33 km/h) | 33.12 mph (53.29 km/h) |
| 40 mph (64.37 km/h) | 37.85 mph (60.91 km/h) |
| 45 mph (72.42 km/h) | 42.58 mph (68.52 km/h) |
| 50 mph (80.47 km/h) | 47.31 mph (76.13 km/h) |
| 55 mph (88.51 km/h) | 52.04 mph (83.75 km/h) |
| 60 mph (96.56 km/h) | 56.77 mph (91.36 km/h) |
| 65 mph (104.61 km/h) | 61.5 mph (98.98 km/h) |
| 70 mph (112.65 km/h) | 66.23 mph (106.59 km/h) |
| 75 mph (120.7 km/h) | 70.96 mph (114.2 km/h) |
| 80 mph (128.75 km/h) | 75.69 mph (121.82 km/h) |
| 85 mph (136.79 km/h) | 80.42 mph (129.43 km/h) |
| 90 mph (144.84 km/h) | 85.15 mph (137.04 km/h) |
| 95 mph (152.89 km/h) | 89.89 mph (144.66 km/h) |
| 100 mph (160.93 km/h) | 94.62 mph (152.27 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1546 | 1795 | 1934 | 2019 | 2111 | 2177 | 2249 | 2335 | 2453 | 2571 | 2703 | 2808 | 2999 | 3209 | 3374 | 3479 | 3538 | 3755 | 4058 | 4715 |
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