Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/25-20 | 245/30-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.61 (650.5) | 25.79 (655) | 0.18 (4.5) 0.7% |
| Width inches (mm) | 11.22 (285) | 9.65 (245) | -1.57 (-40) -14% |
| Circum. inches (mm) | 80.46 (2043.61) | 81.01 (2057.74) | 0.56 (14.14) 0.7% |
| Sidewall Height inches (mm) | 2.81 (71.25) | 2.89 (73.5) | 0.09 (2.25) 3.2% |
| Revolutions per mile (km) | 787.5 (489.33) | 782.09 (485.97) | -5.41 (-3.36) -0.7% |
245/30-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.14 mph (32.41 km/h) |
| 25 mph (40.23 km/h) | 25.17 mph (40.51 km/h) |
| 30 mph (48.28 km/h) | 30.21 mph (48.61 km/h) |
| 35 mph (56.33 km/h) | 35.24 mph (56.72 km/h) |
| 40 mph (64.37 km/h) | 40.28 mph (64.82 km/h) |
| 45 mph (72.42 km/h) | 45.31 mph (72.92 km/h) |
| 50 mph (80.47 km/h) | 50.35 mph (81.02 km/h) |
| 55 mph (88.51 km/h) | 55.38 mph (89.13 km/h) |
| 60 mph (96.56 km/h) | 60.42 mph (97.23 km/h) |
| 65 mph (104.61 km/h) | 65.45 mph (105.33 km/h) |
| 70 mph (112.65 km/h) | 70.48 mph (113.43 km/h) |
| 75 mph (120.7 km/h) | 75.52 mph (121.54 km/h) |
| 80 mph (128.75 km/h) | 80.55 mph (129.64 km/h) |
| 85 mph (136.79 km/h) | 85.59 mph (137.74 km/h) |
| 90 mph (144.84 km/h) | 90.62 mph (145.84 km/h) |
| 95 mph (152.89 km/h) | 95.66 mph (153.95 km/h) |
| 100 mph (160.93 km/h) | 100.69 mph (162.05 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1990 | 2312 | 2490 | 2600 | 2719 | 2803 | 2896 | 3007 | 3159 | 3311 | 3481 | 3616 | 3862 | 4133 | 4345 | 4480 | 4556 | 4836 | 5226 | 6072 |
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