Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/70-16 | 305/55-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.81 (833.4) | 33.21 (843.5) | 0.4 (10.1) 1.2% |
| Width inches (mm) | 12.01 (305) | 12.01 (305) | 0 (0) 0% |
| Circum. inches (mm) | 103.08 (2618.2) | 104.33 (2649.93) | 1.25 (31.73) 1.2% |
| Sidewall Height inches (mm) | 8.41 (213.5) | 6.6 (167.75) | -1.8 (-45.75) -21.4% |
| Revolutions per mile (km) | 614.67 (381.94) | 607.31 (377.37) | -7.36 (-4.57) -1.2% |
305/55-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.24 mph (32.58 km/h) |
| 25 mph (40.23 km/h) | 25.3 mph (40.72 km/h) |
| 30 mph (48.28 km/h) | 30.36 mph (48.87 km/h) |
| 35 mph (56.33 km/h) | 35.42 mph (57.01 km/h) |
| 40 mph (64.37 km/h) | 40.48 mph (65.15 km/h) |
| 45 mph (72.42 km/h) | 45.55 mph (73.3 km/h) |
| 50 mph (80.47 km/h) | 50.61 mph (81.44 km/h) |
| 55 mph (88.51 km/h) | 55.67 mph (89.59 km/h) |
| 60 mph (96.56 km/h) | 60.73 mph (97.73 km/h) |
| 65 mph (104.61 km/h) | 65.79 mph (105.88 km/h) |
| 70 mph (112.65 km/h) | 70.85 mph (114.02 km/h) |
| 75 mph (120.7 km/h) | 75.91 mph (122.16 km/h) |
| 80 mph (128.75 km/h) | 80.97 mph (130.31 km/h) |
| 85 mph (136.79 km/h) | 86.03 mph (138.45 km/h) |
| 90 mph (144.84 km/h) | 91.09 mph (146.6 km/h) |
| 95 mph (152.89 km/h) | 96.15 mph (154.74 km/h) |
| 100 mph (160.93 km/h) | 101.21 mph (162.89 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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