Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/60-20 | 275/65-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 34.41 (874) | 34.07 (865.5) | -0.33 (-8.5) -1% |
| Width inches (mm) | 12.01 (305) | 10.83 (275) | -1.18 (-30) -9.8% |
| Circum. inches (mm) | 108.1 (2745.75) | 107.05 (2719.05) | -1.05 (-26.7) -1% |
| Sidewall Height inches (mm) | 7.2 (183) | 7.04 (178.75) | -0.17 (-4.25) -2.3% |
| Revolutions per mile (km) | 586.12 (364.2) | 591.88 (367.78) | 5.76 (3.58) 1% |
275/65-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.81 mph (31.87 km/h) |
| 25 mph (40.23 km/h) | 24.76 mph (39.84 km/h) |
| 30 mph (48.28 km/h) | 29.71 mph (47.81 km/h) |
| 35 mph (56.33 km/h) | 34.66 mph (55.78 km/h) |
| 40 mph (64.37 km/h) | 39.61 mph (63.75 km/h) |
| 45 mph (72.42 km/h) | 44.56 mph (71.72 km/h) |
| 50 mph (80.47 km/h) | 49.51 mph (79.68 km/h) |
| 55 mph (88.51 km/h) | 54.47 mph (87.65 km/h) |
| 60 mph (96.56 km/h) | 59.42 mph (95.62 km/h) |
| 65 mph (104.61 km/h) | 64.37 mph (103.59 km/h) |
| 70 mph (112.65 km/h) | 69.32 mph (111.56 km/h) |
| 75 mph (120.7 km/h) | 74.27 mph (119.53 km/h) |
| 80 mph (128.75 km/h) | 79.22 mph (127.5 km/h) |
| 85 mph (136.79 km/h) | 84.17 mph (135.46 km/h) |
| 90 mph (144.84 km/h) | 89.12 mph (143.43 km/h) |
| 95 mph (152.89 km/h) | 94.08 mph (151.4 km/h) |
| 100 mph (160.93 km/h) | 99.03 mph (159.37 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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