Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/55-20 | 275/65-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 31.04 (788.5) | 34.07 (865.5) | 3.03 (77) 9.8% |
| Width inches (mm) | 10.04 (255) | 10.83 (275) | 0.79 (20) 7.8% |
| Circum. inches (mm) | 97.53 (2477.15) | 107.05 (2719.05) | 9.52 (241.9) 9.8% |
| Sidewall Height inches (mm) | 5.52 (140.25) | 7.04 (178.75) | 1.52 (38.5) 27.5% |
| Revolutions per mile (km) | 649.68 (403.69) | 591.88 (367.78) | -57.8 (-35.91) -8.9% |
275/65-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.95 mph (35.33 km/h) |
| 25 mph (40.23 km/h) | 27.44 mph (44.16 km/h) |
| 30 mph (48.28 km/h) | 32.93 mph (53 km/h) |
| 35 mph (56.33 km/h) | 38.42 mph (61.83 km/h) |
| 40 mph (64.37 km/h) | 43.91 mph (70.66 km/h) |
| 45 mph (72.42 km/h) | 49.39 mph (79.49 km/h) |
| 50 mph (80.47 km/h) | 54.88 mph (88.33 km/h) |
| 55 mph (88.51 km/h) | 60.37 mph (97.16 km/h) |
| 60 mph (96.56 km/h) | 65.86 mph (105.99 km/h) |
| 65 mph (104.61 km/h) | 71.35 mph (114.82 km/h) |
| 70 mph (112.65 km/h) | 76.84 mph (123.66 km/h) |
| 75 mph (120.7 km/h) | 82.32 mph (132.49 km/h) |
| 80 mph (128.75 km/h) | 87.81 mph (141.32 km/h) |
| 85 mph (136.79 km/h) | 93.3 mph (150.15 km/h) |
| 90 mph (144.84 km/h) | 98.79 mph (158.99 km/h) |
| 95 mph (152.89 km/h) | 104.28 mph (167.82 km/h) |
| 100 mph (160.93 km/h) | 109.77 mph (176.65 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1506 | 1750 | 1884 | 1968 | 2057 | 2122 | 2192 | 2275 | 2391 | 2506 | 2634 | 2737 | 2923 | 3128 | 3288 | 3391 | 3448 | 3660 | 3955 | 4596 |
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