Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 265/30-21 | 275/30-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.26 (692.4) | 27.5 (698.4) | 0.24 (6) 0.9% |
| Width inches (mm) | 10.43 (265) | 10.83 (275) | 0.39 (10) 3.8% |
| Circum. inches (mm) | 85.64 (2175.24) | 86.38 (2194.09) | 0.74 (18.85) 0.9% |
| Sidewall Height inches (mm) | 3.13 (79.5) | 3.25 (82.5) | 0.12 (3) 3.8% |
| Revolutions per mile (km) | 739.85 (459.72) | 733.49 (455.77) | -6.36 (-3.95) -0.9% |
275/30-21 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.17 mph (32.47 km/h) |
| 25 mph (40.23 km/h) | 25.22 mph (40.58 km/h) |
| 30 mph (48.28 km/h) | 30.26 mph (48.7 km/h) |
| 35 mph (56.33 km/h) | 35.3 mph (56.82 km/h) |
| 40 mph (64.37 km/h) | 40.35 mph (64.93 km/h) |
| 45 mph (72.42 km/h) | 45.39 mph (73.05 km/h) |
| 50 mph (80.47 km/h) | 50.43 mph (81.16 km/h) |
| 55 mph (88.51 km/h) | 55.48 mph (89.28 km/h) |
| 60 mph (96.56 km/h) | 60.52 mph (97.4 km/h) |
| 65 mph (104.61 km/h) | 65.56 mph (105.51 km/h) |
| 70 mph (112.65 km/h) | 70.61 mph (113.63 km/h) |
| 75 mph (120.7 km/h) | 75.65 mph (121.75 km/h) |
| 80 mph (128.75 km/h) | 80.69 mph (129.86 km/h) |
| 85 mph (136.79 km/h) | 85.74 mph (137.98 km/h) |
| 90 mph (144.84 km/h) | 90.78 mph (146.1 km/h) |
| 95 mph (152.89 km/h) | 95.82 mph (154.21 km/h) |
| 100 mph (160.93 km/h) | 100.87 mph (162.33 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1867 | 2168 | 2335 | 2438 | 2550 | 2629 | 2716 | 2820 | 2963 | 3106 | 3265 | 3392 | 3622 | 3876 | 4075 | 4202 | 4273 | 4535 | 4901 | 5695 |
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