Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/25-20 | 225/30-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.61 (650.5) | 25.31 (643) | -0.3 (-7.5) -1.2% |
| Width inches (mm) | 11.22 (285) | 8.86 (225) | -2.36 (-60) -21.1% |
| Circum. inches (mm) | 80.46 (2043.61) | 79.53 (2020.04) | -0.93 (-23.56) -1.2% |
| Sidewall Height inches (mm) | 2.81 (71.25) | 2.66 (67.5) | -0.15 (-3.75) -5.3% |
| Revolutions per mile (km) | 787.5 (489.33) | 796.69 (495.04) | 9.19 (5.71) 1.2% |
225/30-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.77 mph (31.82 km/h) |
| 25 mph (40.23 km/h) | 24.71 mph (39.77 km/h) |
| 30 mph (48.28 km/h) | 29.65 mph (47.72 km/h) |
| 35 mph (56.33 km/h) | 34.6 mph (55.68 km/h) |
| 40 mph (64.37 km/h) | 39.54 mph (63.63 km/h) |
| 45 mph (72.42 km/h) | 44.48 mph (71.59 km/h) |
| 50 mph (80.47 km/h) | 49.42 mph (79.54 km/h) |
| 55 mph (88.51 km/h) | 54.37 mph (87.49 km/h) |
| 60 mph (96.56 km/h) | 59.31 mph (95.45 km/h) |
| 65 mph (104.61 km/h) | 64.25 mph (103.4 km/h) |
| 70 mph (112.65 km/h) | 69.19 mph (111.36 km/h) |
| 75 mph (120.7 km/h) | 74.14 mph (119.31 km/h) |
| 80 mph (128.75 km/h) | 79.08 mph (127.26 km/h) |
| 85 mph (136.79 km/h) | 84.02 mph (135.22 km/h) |
| 90 mph (144.84 km/h) | 88.96 mph (143.17 km/h) |
| 95 mph (152.89 km/h) | 93.9 mph (151.13 km/h) |
| 100 mph (160.93 km/h) | 98.85 mph (159.08 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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