Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/55-18 | 275/60-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.91 (759.7) | 32.99 (838) | 3.08 (78.3) 10.3% |
| Width inches (mm) | 10.83 (275) | 10.83 (275) | 0 (0) 0% |
| Circum. inches (mm) | 93.96 (2386.67) | 103.65 (2632.65) | 9.68 (245.99) 10.3% |
| Sidewall Height inches (mm) | 5.95 (151.25) | 6.5 (165) | 0.54 (13.75) 9.1% |
| Revolutions per mile (km) | 674.31 (418.99) | 611.3 (379.84) | -63 (-39.15) -9.3% |
275/60-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.06 mph (35.5 km/h) |
| 25 mph (40.23 km/h) | 27.58 mph (44.38 km/h) |
| 30 mph (48.28 km/h) | 33.09 mph (53.26 km/h) |
| 35 mph (56.33 km/h) | 38.61 mph (62.13 km/h) |
| 40 mph (64.37 km/h) | 44.12 mph (71.01 km/h) |
| 45 mph (72.42 km/h) | 49.64 mph (79.88 km/h) |
| 50 mph (80.47 km/h) | 55.15 mph (88.76 km/h) |
| 55 mph (88.51 km/h) | 60.67 mph (97.64 km/h) |
| 60 mph (96.56 km/h) | 66.18 mph (106.51 km/h) |
| 65 mph (104.61 km/h) | 71.7 mph (115.39 km/h) |
| 70 mph (112.65 km/h) | 77.21 mph (124.27 km/h) |
| 75 mph (120.7 km/h) | 82.73 mph (133.14 km/h) |
| 80 mph (128.75 km/h) | 88.25 mph (142.02 km/h) |
| 85 mph (136.79 km/h) | 93.76 mph (150.89 km/h) |
| 90 mph (144.84 km/h) | 99.28 mph (159.77 km/h) |
| 95 mph (152.89 km/h) | 104.79 mph (168.65 km/h) |
| 100 mph (160.93 km/h) | 110.31 mph (177.52 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1556 | 1807 | 1946 | 2032 | 2125 | 2191 | 2264 | 2350 | 2469 | 2588 | 2721 | 2827 | 3019 | 3230 | 3396 | 3502 | 3561 | 3780 | 4084 | 4746 |
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