Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 165/60-20 | 315/50-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.8 (706) | 32.4 (823) | 4.61 (117) 16.6% |
| Width inches (mm) | 6.5 (165) | 12.4 (315) | 5.91 (150) 90.9% |
| Circum. inches (mm) | 87.32 (2217.96) | 101.79 (2585.53) | 14.47 (367.57) 16.6% |
| Sidewall Height inches (mm) | 3.9 (99) | 6.2 (157.5) | 2.3 (58.5) 59.1% |
| Revolutions per mile (km) | 725.6 (450.86) | 622.44 (386.77) | -103.15 (-64.1) -14.2% |
315/50-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.31 mph (37.52 km/h) |
| 25 mph (40.23 km/h) | 29.14 mph (46.9 km/h) |
| 30 mph (48.28 km/h) | 34.97 mph (56.28 km/h) |
| 35 mph (56.33 km/h) | 40.8 mph (65.66 km/h) |
| 40 mph (64.37 km/h) | 46.63 mph (75.04 km/h) |
| 45 mph (72.42 km/h) | 52.46 mph (84.42 km/h) |
| 50 mph (80.47 km/h) | 58.29 mph (93.8 km/h) |
| 55 mph (88.51 km/h) | 64.11 mph (103.18 km/h) |
| 60 mph (96.56 km/h) | 69.94 mph (112.56 km/h) |
| 65 mph (104.61 km/h) | 75.77 mph (121.94 km/h) |
| 70 mph (112.65 km/h) | 81.6 mph (131.32 km/h) |
| 75 mph (120.7 km/h) | 87.43 mph (140.7 km/h) |
| 80 mph (128.75 km/h) | 93.26 mph (150.08 km/h) |
| 85 mph (136.79 km/h) | 99.09 mph (159.46 km/h) |
| 90 mph (144.84 km/h) | 104.92 mph (168.84 km/h) |
| 95 mph (152.89 km/h) | 110.74 mph (178.22 km/h) |
| 100 mph (160.93 km/h) | 116.57 mph (187.61 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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