Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/55-17 | 275/45-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.18 (690.3) | 29.74 (755.5) | 2.57 (65.2) 9.4% |
| Width inches (mm) | 9.25 (235) | 10.83 (275) | 1.57 (40) 17% |
| Circum. inches (mm) | 85.38 (2168.64) | 93.44 (2373.47) | 8.06 (204.83) 9.4% |
| Sidewall Height inches (mm) | 5.09 (129.25) | 4.87 (123.75) | -0.22 (-5.5) -4.3% |
| Revolutions per mile (km) | 742.1 (461.12) | 678.05 (421.32) | -64.04 (-39.79) -8.6% |
275/45-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.89 mph (35.23 km/h) |
| 25 mph (40.23 km/h) | 27.36 mph (44.03 km/h) |
| 30 mph (48.28 km/h) | 32.83 mph (52.84 km/h) |
| 35 mph (56.33 km/h) | 38.31 mph (61.65 km/h) |
| 40 mph (64.37 km/h) | 43.78 mph (70.45 km/h) |
| 45 mph (72.42 km/h) | 49.25 mph (79.26 km/h) |
| 50 mph (80.47 km/h) | 54.72 mph (88.07 km/h) |
| 55 mph (88.51 km/h) | 60.19 mph (96.87 km/h) |
| 60 mph (96.56 km/h) | 65.67 mph (105.68 km/h) |
| 65 mph (104.61 km/h) | 71.14 mph (114.49 km/h) |
| 70 mph (112.65 km/h) | 76.61 mph (123.29 km/h) |
| 75 mph (120.7 km/h) | 82.08 mph (132.1 km/h) |
| 80 mph (128.75 km/h) | 87.56 mph (140.91 km/h) |
| 85 mph (136.79 km/h) | 93.03 mph (149.71 km/h) |
| 90 mph (144.84 km/h) | 98.5 mph (158.52 km/h) |
| 95 mph (152.89 km/h) | 103.97 mph (167.33 km/h) |
| 100 mph (160.93 km/h) | 109.45 mph (176.14 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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