Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/25-21 | 225/30-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.41 (670.9) | 25.31 (643) | -1.1 (-27.9) -4.2% |
| Width inches (mm) | 10.83 (275) | 8.86 (225) | -1.97 (-50) -18.2% |
| Circum. inches (mm) | 82.98 (2107.69) | 79.53 (2020.04) | -3.45 (-87.65) -4.2% |
| Sidewall Height inches (mm) | 2.71 (68.75) | 2.66 (67.5) | -0.05 (-1.25) -1.8% |
| Revolutions per mile (km) | 763.56 (474.45) | 796.69 (495.04) | 33.13 (20.59) 4.3% |
225/30-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.17 mph (30.85 km/h) |
| 25 mph (40.23 km/h) | 23.96 mph (38.56 km/h) |
| 30 mph (48.28 km/h) | 28.75 mph (46.27 km/h) |
| 35 mph (56.33 km/h) | 33.54 mph (53.98 km/h) |
| 40 mph (64.37 km/h) | 38.34 mph (61.7 km/h) |
| 45 mph (72.42 km/h) | 43.13 mph (69.41 km/h) |
| 50 mph (80.47 km/h) | 47.92 mph (77.12 km/h) |
| 55 mph (88.51 km/h) | 52.71 mph (84.83 km/h) |
| 60 mph (96.56 km/h) | 57.5 mph (92.55 km/h) |
| 65 mph (104.61 km/h) | 62.3 mph (100.26 km/h) |
| 70 mph (112.65 km/h) | 67.09 mph (107.97 km/h) |
| 75 mph (120.7 km/h) | 71.88 mph (115.68 km/h) |
| 80 mph (128.75 km/h) | 76.67 mph (123.39 km/h) |
| 85 mph (136.79 km/h) | 81.47 mph (131.11 km/h) |
| 90 mph (144.84 km/h) | 86.26 mph (138.82 km/h) |
| 95 mph (152.89 km/h) | 91.05 mph (146.53 km/h) |
| 100 mph (160.93 km/h) | 95.84 mph (154.24 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2027 | 2355 | 2536 | 2649 | 2769 | 2856 | 2951 | 3063 | 3218 | 3373 | 3546 | 3684 | 3934 | 4210 | 4426 | 4564 | 4641 | 4926 | 5323 | 6186 |
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