Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 40/12.5-20 | 315/75-16 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 40.03 (1016.8) | 34.6 (878.9) | -5.43 (-137.9) -13.6% |
| Width inches (mm) | 12.52 (318) | 12.4 (315) | -0.12 (-3) -0.9% |
| Circum. inches (mm) | 125.76 (3194.37) | 108.71 (2761.15) | -17.06 (-433.23) -13.6% |
| Sidewall Height inches (mm) | 10.02 (254.4) | 9.3 (236.25) | -0.71 (-18.15) -7.1% |
| Revolutions per mile (km) | 503.81 (313.05) | 582.85 (362.17) | 79.05 (49.12) 15.7% |
315/75-16 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 17.29 mph (27.82 km/h) |
| 25 mph (40.23 km/h) | 21.61 mph (34.78 km/h) |
| 30 mph (48.28 km/h) | 25.93 mph (41.73 km/h) |
| 35 mph (56.33 km/h) | 30.25 mph (48.69 km/h) |
| 40 mph (64.37 km/h) | 34.58 mph (55.64 km/h) |
| 45 mph (72.42 km/h) | 38.9 mph (62.6 km/h) |
| 50 mph (80.47 km/h) | 43.22 mph (69.55 km/h) |
| 55 mph (88.51 km/h) | 47.54 mph (76.51 km/h) |
| 60 mph (96.56 km/h) | 51.86 mph (83.47 km/h) |
| 65 mph (104.61 km/h) | 56.18 mph (90.42 km/h) |
| 70 mph (112.65 km/h) | 60.51 mph (97.38 km/h) |
| 75 mph (120.7 km/h) | 64.83 mph (104.33 km/h) |
| 80 mph (128.75 km/h) | 69.15 mph (111.29 km/h) |
| 85 mph (136.79 km/h) | 73.47 mph (118.24 km/h) |
| 90 mph (144.84 km/h) | 77.79 mph (125.2 km/h) |
| 95 mph (152.89 km/h) | 82.12 mph (132.15 km/h) |
| 100 mph (160.93 km/h) | 86.44 mph (139.11 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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