Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/25-20 | 305/25-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.41 (645.5) | 26 (660.5) | 0.59 (15) 2.3% |
| Width inches (mm) | 10.83 (275) | 12.01 (305) | 1.18 (30) 10.9% |
| Circum. inches (mm) | 79.84 (2027.9) | 81.69 (2075.02) | 1.86 (47.12) 2.3% |
| Sidewall Height inches (mm) | 2.71 (68.75) | 3 (76.25) | 0.3 (7.5) 10.9% |
| Revolutions per mile (km) | 793.6 (493.12) | 775.58 (481.92) | -18.02 (-11.2) -2.3% |
305/25-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.46 mph (32.93 km/h) |
| 25 mph (40.23 km/h) | 25.58 mph (41.17 km/h) |
| 30 mph (48.28 km/h) | 30.7 mph (49.4 km/h) |
| 35 mph (56.33 km/h) | 35.81 mph (57.64 km/h) |
| 40 mph (64.37 km/h) | 40.93 mph (65.87 km/h) |
| 45 mph (72.42 km/h) | 46.05 mph (74.1 km/h) |
| 50 mph (80.47 km/h) | 51.16 mph (82.34 km/h) |
| 55 mph (88.51 km/h) | 56.28 mph (90.57 km/h) |
| 60 mph (96.56 km/h) | 61.39 mph (98.8 km/h) |
| 65 mph (104.61 km/h) | 66.51 mph (107.04 km/h) |
| 70 mph (112.65 km/h) | 71.63 mph (115.27 km/h) |
| 75 mph (120.7 km/h) | 76.74 mph (123.51 km/h) |
| 80 mph (128.75 km/h) | 81.86 mph (131.74 km/h) |
| 85 mph (136.79 km/h) | 86.98 mph (139.97 km/h) |
| 90 mph (144.84 km/h) | 92.09 mph (148.21 km/h) |
| 95 mph (152.89 km/h) | 97.21 mph (156.44 km/h) |
| 100 mph (160.93 km/h) | 102.32 mph (164.67 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1974 | 2293 | 2469 | 2578 | 2696 | 2780 | 2872 | 2982 | 3133 | 3284 | 3452 | 3586 | 3830 | 4099 | 4309 | 4443 | 4519 | 4796 | 5182 | 6022 |
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