Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/25-20 | 275/65-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.4 (670.5) | 34.07 (865.5) | 7.68 (195) 29.1% |
| Width inches (mm) | 12.8 (325) | 10.83 (275) | -1.97 (-50) -15.4% |
| Circum. inches (mm) | 82.93 (2106.44) | 107.05 (2719.05) | 24.12 (612.61) 29.1% |
| Sidewall Height inches (mm) | 3.2 (81.25) | 7.04 (178.75) | 3.84 (97.5) 120% |
| Revolutions per mile (km) | 764.01 (474.73) | 591.88 (367.78) | -172.13 (-106.96) -22.5% |
275/65-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 25.82 mph (41.55 km/h) |
| 25 mph (40.23 km/h) | 32.27 mph (51.93 km/h) |
| 30 mph (48.28 km/h) | 38.72 mph (62.32 km/h) |
| 35 mph (56.33 km/h) | 45.18 mph (72.71 km/h) |
| 40 mph (64.37 km/h) | 51.63 mph (83.1 km/h) |
| 45 mph (72.42 km/h) | 58.09 mph (93.48 km/h) |
| 50 mph (80.47 km/h) | 64.54 mph (103.87 km/h) |
| 55 mph (88.51 km/h) | 71 mph (114.26 km/h) |
| 60 mph (96.56 km/h) | 77.45 mph (124.64 km/h) |
| 65 mph (104.61 km/h) | 83.9 mph (135.03 km/h) |
| 70 mph (112.65 km/h) | 90.36 mph (145.42 km/h) |
| 75 mph (120.7 km/h) | 96.81 mph (155.8 km/h) |
| 80 mph (128.75 km/h) | 103.27 mph (166.19 km/h) |
| 85 mph (136.79 km/h) | 109.72 mph (176.58 km/h) |
| 90 mph (144.84 km/h) | 116.17 mph (186.97 km/h) |
| 95 mph (152.89 km/h) | 122.63 mph (197.35 km/h) |
| 100 mph (160.93 km/h) | 129.08 mph (207.74 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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