Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/55-15 | 275/55-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 22.58 (573.5) | 31.91 (810.5) | 9.33 (237) 41.3% |
| Width inches (mm) | 6.89 (175) | 10.83 (275) | 3.94 (100) 57.1% |
| Circum. inches (mm) | 70.93 (1801.7) | 100.25 (2546.26) | 29.31 (744.56) 41.3% |
| Sidewall Height inches (mm) | 3.79 (96.25) | 5.95 (151.25) | 2.17 (55) 57.1% |
| Revolutions per mile (km) | 893.23 (555.03) | 632.04 (392.73) | -261.19 (-162.3) -29.2% |
275/55-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 28.27 mph (45.49 km/h) |
| 25 mph (40.23 km/h) | 35.33 mph (56.86 km/h) |
| 30 mph (48.28 km/h) | 42.4 mph (68.23 km/h) |
| 35 mph (56.33 km/h) | 49.46 mph (79.6 km/h) |
| 40 mph (64.37 km/h) | 56.53 mph (90.98 km/h) |
| 45 mph (72.42 km/h) | 63.6 mph (102.35 km/h) |
| 50 mph (80.47 km/h) | 70.66 mph (113.72 km/h) |
| 55 mph (88.51 km/h) | 77.73 mph (125.09 km/h) |
| 60 mph (96.56 km/h) | 84.8 mph (136.46 km/h) |
| 65 mph (104.61 km/h) | 91.86 mph (147.84 km/h) |
| 70 mph (112.65 km/h) | 98.93 mph (159.21 km/h) |
| 75 mph (120.7 km/h) | 105.99 mph (170.58 km/h) |
| 80 mph (128.75 km/h) | 113.06 mph (181.95 km/h) |
| 85 mph (136.79 km/h) | 120.13 mph (193.33 km/h) |
| 90 mph (144.84 km/h) | 127.19 mph (204.7 km/h) |
| 95 mph (152.89 km/h) | 134.26 mph (216.07 km/h) |
| 100 mph (160.93 km/h) | 141.33 mph (227.44 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1608 | 1869 | 2012 | 2101 | 2197 | 2265 | 2341 | 2430 | 2553 | 2676 | 2813 | 2923 | 3121 | 3340 | 3511 | 3621 | 3682 | 3908 | 4223 | 4907 |
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