Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/30-20 | 275/30-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.79 (655) | 26.5 (673) | 0.71 (18) 2.7% |
| Width inches (mm) | 9.65 (245) | 10.83 (275) | 1.18 (30) 12.2% |
| Circum. inches (mm) | 81.01 (2057.74) | 83.24 (2114.29) | 2.23 (56.55) 2.7% |
| Sidewall Height inches (mm) | 2.89 (73.5) | 3.25 (82.5) | 0.35 (9) 12.2% |
| Revolutions per mile (km) | 782.09 (485.97) | 761.17 (472.97) | -20.92 (-13) -2.7% |
275/30-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.55 mph (33.07 km/h) |
| 25 mph (40.23 km/h) | 25.69 mph (41.34 km/h) |
| 30 mph (48.28 km/h) | 30.82 mph (49.61 km/h) |
| 35 mph (56.33 km/h) | 35.96 mph (57.88 km/h) |
| 40 mph (64.37 km/h) | 41.1 mph (66.14 km/h) |
| 45 mph (72.42 km/h) | 46.24 mph (74.41 km/h) |
| 50 mph (80.47 km/h) | 51.37 mph (82.68 km/h) |
| 55 mph (88.51 km/h) | 56.51 mph (90.95 km/h) |
| 60 mph (96.56 km/h) | 61.65 mph (99.21 km/h) |
| 65 mph (104.61 km/h) | 66.79 mph (107.48 km/h) |
| 70 mph (112.65 km/h) | 71.92 mph (115.75 km/h) |
| 75 mph (120.7 km/h) | 77.06 mph (124.02 km/h) |
| 80 mph (128.75 km/h) | 82.2 mph (132.29 km/h) |
| 85 mph (136.79 km/h) | 87.34 mph (140.55 km/h) |
| 90 mph (144.84 km/h) | 92.47 mph (148.82 km/h) |
| 95 mph (152.89 km/h) | 97.61 mph (157.09 km/h) |
| 100 mph (160.93 km/h) | 102.75 mph (165.36 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1937 | 2250 | 2423 | 2531 | 2646 | 2728 | 2819 | 2926 | 3075 | 3223 | 3388 | 3520 | 3759 | 4022 | 4229 | 4360 | 4435 | 4707 | 5086 | 5910 |
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