Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 315/25-20 | 305/25-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.2 (665.5) | 26 (660.5) | -0.2 (-5) -0.8% |
| Width inches (mm) | 12.4 (315) | 12.01 (305) | -0.39 (-10) -3.2% |
| Circum. inches (mm) | 82.31 (2090.73) | 81.69 (2075.02) | -0.62 (-15.71) -0.8% |
| Sidewall Height inches (mm) | 3.1 (78.75) | 3 (76.25) | -0.1 (-2.5) -3.2% |
| Revolutions per mile (km) | 769.75 (478.3) | 775.58 (481.92) | 5.83 (3.62) 0.8% |
305/25-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.85 mph (31.95 km/h) |
| 25 mph (40.23 km/h) | 24.81 mph (39.93 km/h) |
| 30 mph (48.28 km/h) | 29.77 mph (47.92 km/h) |
| 35 mph (56.33 km/h) | 34.74 mph (55.9 km/h) |
| 40 mph (64.37 km/h) | 39.7 mph (63.89 km/h) |
| 45 mph (72.42 km/h) | 44.66 mph (71.88 km/h) |
| 50 mph (80.47 km/h) | 49.62 mph (79.86 km/h) |
| 55 mph (88.51 km/h) | 54.59 mph (87.85 km/h) |
| 60 mph (96.56 km/h) | 59.55 mph (95.84 km/h) |
| 65 mph (104.61 km/h) | 64.51 mph (103.82 km/h) |
| 70 mph (112.65 km/h) | 69.47 mph (111.81 km/h) |
| 75 mph (120.7 km/h) | 74.44 mph (119.79 km/h) |
| 80 mph (128.75 km/h) | 79.4 mph (127.78 km/h) |
| 85 mph (136.79 km/h) | 84.36 mph (135.77 km/h) |
| 90 mph (144.84 km/h) | 89.32 mph (143.75 km/h) |
| 95 mph (152.89 km/h) | 94.29 mph (151.74 km/h) |
| 100 mph (160.93 km/h) | 99.25 mph (159.73 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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