Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 38/15.5-20 | 315/75-16 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 37.99 (965.04) | 34.6 (878.9) | -3.39 (-86.14) -8.9% |
| Width inches (mm) | 15.51 (394) | 12.4 (315) | -3.11 (-79) -20.1% |
| Circum. inches (mm) | 119.36 (3031.76) | 108.71 (2761.15) | -10.65 (-270.62) -8.9% |
| Sidewall Height inches (mm) | 9 (228.52) | 9.3 (236.25) | 0.3 (7.73) 3.4% |
| Revolutions per mile (km) | 530.83 (329.84) | 582.85 (362.17) | 52.03 (32.33) 9.8% |
315/75-16 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.21 mph (29.31 km/h) |
| 25 mph (40.23 km/h) | 22.77 mph (36.64 km/h) |
| 30 mph (48.28 km/h) | 27.32 mph (43.97 km/h) |
| 35 mph (56.33 km/h) | 31.88 mph (51.3 km/h) |
| 40 mph (64.37 km/h) | 36.43 mph (58.63 km/h) |
| 45 mph (72.42 km/h) | 40.98 mph (65.96 km/h) |
| 50 mph (80.47 km/h) | 45.54 mph (73.28 km/h) |
| 55 mph (88.51 km/h) | 50.09 mph (80.61 km/h) |
| 60 mph (96.56 km/h) | 54.64 mph (87.94 km/h) |
| 65 mph (104.61 km/h) | 59.2 mph (95.27 km/h) |
| 70 mph (112.65 km/h) | 63.75 mph (102.6 km/h) |
| 75 mph (120.7 km/h) | 68.31 mph (109.93 km/h) |
| 80 mph (128.75 km/h) | 72.86 mph (117.26 km/h) |
| 85 mph (136.79 km/h) | 77.41 mph (124.58 km/h) |
| 90 mph (144.84 km/h) | 81.97 mph (131.91 km/h) |
| 95 mph (152.89 km/h) | 86.52 mph (139.24 km/h) |
| 100 mph (160.93 km/h) | 91.07 mph (146.57 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1483 | 1723 | 1856 | 1938 | 2026 | 2089 | 2159 | 2241 | 2354 | 2468 | 2594 | 2695 | 2878 | 3080 | 3238 | 3339 | 3396 | 3604 | 3894 | 4525 |
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