Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 315/70-18 | 275/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 35.36 (898.2) | 33.16 (842.2) | -2.2 (-56) -6.2% |
| Width inches (mm) | 12.4 (315) | 10.83 (275) | -1.57 (-40) -12.7% |
| Circum. inches (mm) | 111.09 (2821.78) | 104.17 (2645.85) | -6.93 (-175.93) -6.2% |
| Sidewall Height inches (mm) | 8.68 (220.5) | 7.58 (192.5) | -1.1 (-28) -12.7% |
| Revolutions per mile (km) | 570.33 (354.39) | 608.25 (377.95) | 37.92 (23.56) 6.6% |
275/70-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.75 mph (30.18 km/h) |
| 25 mph (40.23 km/h) | 23.44 mph (37.73 km/h) |
| 30 mph (48.28 km/h) | 28.13 mph (45.27 km/h) |
| 35 mph (56.33 km/h) | 32.82 mph (52.82 km/h) |
| 40 mph (64.37 km/h) | 37.51 mph (60.36 km/h) |
| 45 mph (72.42 km/h) | 42.19 mph (67.91 km/h) |
| 50 mph (80.47 km/h) | 46.88 mph (75.45 km/h) |
| 55 mph (88.51 km/h) | 51.57 mph (83 km/h) |
| 60 mph (96.56 km/h) | 56.26 mph (90.54 km/h) |
| 65 mph (104.61 km/h) | 60.95 mph (98.09 km/h) |
| 70 mph (112.65 km/h) | 65.64 mph (105.63 km/h) |
| 75 mph (120.7 km/h) | 70.32 mph (113.18 km/h) |
| 80 mph (128.75 km/h) | 75.01 mph (120.72 km/h) |
| 85 mph (136.79 km/h) | 79.7 mph (128.27 km/h) |
| 90 mph (144.84 km/h) | 84.39 mph (135.81 km/h) |
| 95 mph (152.89 km/h) | 89.08 mph (143.36 km/h) |
| 100 mph (160.93 km/h) | 93.77 mph (150.9 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1548 | 1798 | 1937 | 2022 | 2114 | 2180 | 2253 | 2338 | 2457 | 2575 | 2707 | 2813 | 3004 | 3214 | 3379 | 3484 | 3544 | 3761 | 4064 | 4723 |
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