Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/80-20 | 300/65-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 37.32 (948) | 35.35 (898) | -1.97 (-50) -5.3% |
| Width inches (mm) | 10.83 (275) | 11.81 (300) | 0.98 (25) 9.1% |
| Circum. inches (mm) | 117.25 (2978.23) | 111.07 (2821.15) | -6.18 (-157.08) -5.3% |
| Sidewall Height inches (mm) | 8.66 (220) | 7.68 (195) | -0.98 (-25) -11.4% |
| Revolutions per mile (km) | 540.37 (335.77) | 570.46 (354.46) | 30.09 (18.7) 5.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.95 mph (30.49 km/h) |
| 25 mph (40.23 km/h) | 23.68 mph (38.11 km/h) |
| 30 mph (48.28 km/h) | 28.42 mph (45.73 km/h) |
| 35 mph (56.33 km/h) | 33.15 mph (53.36 km/h) |
| 40 mph (64.37 km/h) | 37.89 mph (60.98 km/h) |
| 45 mph (72.42 km/h) | 42.63 mph (68.6 km/h) |
| 50 mph (80.47 km/h) | 47.36 mph (76.22 km/h) |
| 55 mph (88.51 km/h) | 52.1 mph (83.85 km/h) |
| 60 mph (96.56 km/h) | 56.84 mph (91.47 km/h) |
| 65 mph (104.61 km/h) | 61.57 mph (99.09 km/h) |
| 70 mph (112.65 km/h) | 66.31 mph (106.71 km/h) |
| 75 mph (120.7 km/h) | 71.04 mph (114.33 km/h) |
| 80 mph (128.75 km/h) | 75.78 mph (121.96 km/h) |
| 85 mph (136.79 km/h) | 80.52 mph (129.58 km/h) |
| 90 mph (144.84 km/h) | 85.25 mph (137.2 km/h) |
| 95 mph (152.89 km/h) | 89.99 mph (144.82 km/h) |
| 100 mph (160.93 km/h) | 94.73 mph (152.45 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1452 | 1686 | 1816 | 1896 | 1983 | 2045 | 2113 | 2193 | 2304 | 2415 | 2539 | 2638 | 2817 | 3015 | 3169 | 3268 | 3323 | 3527 | 3811 | 4429 |
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