Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/55-18 | 275/45-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.91 (759.7) | 29.74 (755.5) | -0.17 (-4.2) -0.6% |
| Width inches (mm) | 10.83 (275) | 10.83 (275) | 0 (0) 0% |
| Circum. inches (mm) | 93.96 (2386.67) | 93.44 (2373.47) | -0.52 (-13.19) -0.6% |
| Sidewall Height inches (mm) | 5.95 (151.25) | 4.87 (123.75) | -1.08 (-27.5) -18.2% |
| Revolutions per mile (km) | 674.31 (418.99) | 678.05 (421.32) | 3.75 (2.33) 0.6% |
275/45-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.89 mph (32.01 km/h) |
| 25 mph (40.23 km/h) | 24.86 mph (40.01 km/h) |
| 30 mph (48.28 km/h) | 29.83 mph (48.01 km/h) |
| 35 mph (56.33 km/h) | 34.81 mph (56.02 km/h) |
| 40 mph (64.37 km/h) | 39.78 mph (64.02 km/h) |
| 45 mph (72.42 km/h) | 44.75 mph (72.02 km/h) |
| 50 mph (80.47 km/h) | 49.72 mph (80.02 km/h) |
| 55 mph (88.51 km/h) | 54.7 mph (88.02 km/h) |
| 60 mph (96.56 km/h) | 59.67 mph (96.03 km/h) |
| 65 mph (104.61 km/h) | 64.64 mph (104.03 km/h) |
| 70 mph (112.65 km/h) | 69.61 mph (112.03 km/h) |
| 75 mph (120.7 km/h) | 74.59 mph (120.03 km/h) |
| 80 mph (128.75 km/h) | 79.56 mph (128.04 km/h) |
| 85 mph (136.79 km/h) | 84.53 mph (136.04 km/h) |
| 90 mph (144.84 km/h) | 89.5 mph (144.04 km/h) |
| 95 mph (152.89 km/h) | 94.47 mph (152.04 km/h) |
| 100 mph (160.93 km/h) | 99.45 mph (160.04 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1726 | 2005 | 2159 | 2254 | 2357 | 2430 | 2511 | 2607 | 2739 | 2871 | 3018 | 3135 | 3348 | 3583 | 3767 | 3884 | 3950 | 4193 | 4530 | 5265 |
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