Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 295/25-21 | 275/30-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.81 (680.9) | 27.5 (698.4) | 0.69 (17.5) 2.6% |
| Width inches (mm) | 11.61 (295) | 10.83 (275) | -0.79 (-20) -6.8% |
| Circum. inches (mm) | 84.22 (2139.11) | 86.38 (2194.09) | 2.16 (54.98) 2.6% |
| Sidewall Height inches (mm) | 2.9 (73.75) | 3.25 (82.5) | 0.34 (8.75) 11.9% |
| Revolutions per mile (km) | 752.34 (467.48) | 733.49 (455.77) | -18.85 (-11.71) -2.5% |
275/30-21 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.51 mph (33.01 km/h) |
| 25 mph (40.23 km/h) | 25.64 mph (41.27 km/h) |
| 30 mph (48.28 km/h) | 30.77 mph (49.52 km/h) |
| 35 mph (56.33 km/h) | 35.9 mph (57.77 km/h) |
| 40 mph (64.37 km/h) | 41.03 mph (66.03 km/h) |
| 45 mph (72.42 km/h) | 46.16 mph (74.28 km/h) |
| 50 mph (80.47 km/h) | 51.29 mph (82.54 km/h) |
| 55 mph (88.51 km/h) | 56.41 mph (90.79 km/h) |
| 60 mph (96.56 km/h) | 61.54 mph (99.04 km/h) |
| 65 mph (104.61 km/h) | 66.67 mph (107.3 km/h) |
| 70 mph (112.65 km/h) | 71.8 mph (115.55 km/h) |
| 75 mph (120.7 km/h) | 76.93 mph (123.8 km/h) |
| 80 mph (128.75 km/h) | 82.06 mph (132.06 km/h) |
| 85 mph (136.79 km/h) | 87.18 mph (140.31 km/h) |
| 90 mph (144.84 km/h) | 92.31 mph (148.56 km/h) |
| 95 mph (152.89 km/h) | 97.44 mph (156.82 km/h) |
| 100 mph (160.93 km/h) | 102.57 mph (165.07 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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