Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/25-19 | 305/55-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25 (635.1) | 33.21 (843.5) | 8.2 (208.4) 32.8% |
| Width inches (mm) | 12.01 (305) | 12.01 (305) | 0 (0) 0% |
| Circum. inches (mm) | 78.55 (1995.23) | 104.33 (2649.93) | 25.78 (654.71) 32.8% |
| Sidewall Height inches (mm) | 3 (76.25) | 6.6 (167.75) | 3.6 (91.5) 120% |
| Revolutions per mile (km) | 806.6 (501.2) | 607.31 (377.37) | -199.28 (-123.83) -24.7% |
305/55-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 26.56 mph (42.75 km/h) |
| 25 mph (40.23 km/h) | 33.2 mph (53.44 km/h) |
| 30 mph (48.28 km/h) | 39.84 mph (64.12 km/h) |
| 35 mph (56.33 km/h) | 46.48 mph (74.81 km/h) |
| 40 mph (64.37 km/h) | 53.13 mph (85.5 km/h) |
| 45 mph (72.42 km/h) | 59.77 mph (96.18 km/h) |
| 50 mph (80.47 km/h) | 66.41 mph (106.87 km/h) |
| 55 mph (88.51 km/h) | 73.05 mph (117.56 km/h) |
| 60 mph (96.56 km/h) | 79.69 mph (128.25 km/h) |
| 65 mph (104.61 km/h) | 86.33 mph (138.93 km/h) |
| 70 mph (112.65 km/h) | 92.97 mph (149.62 km/h) |
| 75 mph (120.7 km/h) | 99.61 mph (160.31 km/h) |
| 80 mph (128.75 km/h) | 106.25 mph (170.99 km/h) |
| 85 mph (136.79 km/h) | 112.89 mph (181.68 km/h) |
| 90 mph (144.84 km/h) | 119.53 mph (192.37 km/h) |
| 95 mph (152.89 km/h) | 126.17 mph (203.06 km/h) |
| 100 mph (160.93 km/h) | 132.81 mph (213.74 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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