Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 315/25-20 | 315/50-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.2 (665.5) | 32.4 (823) | 6.2 (157.5) 23.7% |
| Width inches (mm) | 12.4 (315) | 12.4 (315) | 0 (0) 0% |
| Circum. inches (mm) | 82.31 (2090.73) | 101.79 (2585.53) | 19.48 (494.8) 23.7% |
| Sidewall Height inches (mm) | 3.1 (78.75) | 6.2 (157.5) | 3.1 (78.75) 100% |
| Revolutions per mile (km) | 769.75 (478.3) | 622.44 (386.77) | -147.31 (-91.53) -19.1% |
315/50-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 24.73 mph (39.8 km/h) |
| 25 mph (40.23 km/h) | 30.92 mph (49.76 km/h) |
| 30 mph (48.28 km/h) | 37.1 mph (59.71 km/h) |
| 35 mph (56.33 km/h) | 43.28 mph (69.66 km/h) |
| 40 mph (64.37 km/h) | 49.47 mph (79.61 km/h) |
| 45 mph (72.42 km/h) | 55.65 mph (89.56 km/h) |
| 50 mph (80.47 km/h) | 61.83 mph (99.51 km/h) |
| 55 mph (88.51 km/h) | 68.02 mph (109.46 km/h) |
| 60 mph (96.56 km/h) | 74.2 mph (119.41 km/h) |
| 65 mph (104.61 km/h) | 80.38 mph (129.36 km/h) |
| 70 mph (112.65 km/h) | 86.57 mph (139.32 km/h) |
| 75 mph (120.7 km/h) | 92.75 mph (149.27 km/h) |
| 80 mph (128.75 km/h) | 98.93 mph (159.22 km/h) |
| 85 mph (136.79 km/h) | 105.12 mph (169.17 km/h) |
| 90 mph (144.84 km/h) | 111.3 mph (179.12 km/h) |
| 95 mph (152.89 km/h) | 117.48 mph (189.07 km/h) |
| 100 mph (160.93 km/h) | 123.67 mph (199.02 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1584 | 1840 | 1982 | 2069 | 2164 | 2231 | 2305 | 2393 | 2514 | 2636 | 2770 | 2878 | 3074 | 3289 | 3458 | 3566 | 3626 | 3849 | 4159 | 4833 |
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