Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/65-18 | 275/65-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.07 (814.7) | 34.07 (865.5) | 2 (50.8) 6.2% |
| Width inches (mm) | 10.83 (275) | 10.83 (275) | 0 (0) 0% |
| Circum. inches (mm) | 100.77 (2559.46) | 107.05 (2719.05) | 6.28 (159.59) 6.2% |
| Sidewall Height inches (mm) | 7.04 (178.75) | 7.04 (178.75) | 0 (0) 0% |
| Revolutions per mile (km) | 628.78 (390.71) | 591.88 (367.78) | -36.91 (-22.93) -5.9% |
275/65-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.25 mph (34.19 km/h) |
| 25 mph (40.23 km/h) | 26.56 mph (42.74 km/h) |
| 30 mph (48.28 km/h) | 31.87 mph (51.29 km/h) |
| 35 mph (56.33 km/h) | 37.18 mph (59.84 km/h) |
| 40 mph (64.37 km/h) | 42.49 mph (68.39 km/h) |
| 45 mph (72.42 km/h) | 47.81 mph (76.94 km/h) |
| 50 mph (80.47 km/h) | 53.12 mph (85.48 km/h) |
| 55 mph (88.51 km/h) | 58.43 mph (94.03 km/h) |
| 60 mph (96.56 km/h) | 63.74 mph (102.58 km/h) |
| 65 mph (104.61 km/h) | 69.05 mph (111.13 km/h) |
| 70 mph (112.65 km/h) | 74.36 mph (119.68 km/h) |
| 75 mph (120.7 km/h) | 79.68 mph (128.23 km/h) |
| 80 mph (128.75 km/h) | 84.99 mph (136.78 km/h) |
| 85 mph (136.79 km/h) | 90.3 mph (145.32 km/h) |
| 90 mph (144.84 km/h) | 95.61 mph (153.87 km/h) |
| 95 mph (152.89 km/h) | 100.92 mph (162.42 km/h) |
| 100 mph (160.93 km/h) | 106.24 mph (170.97 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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