Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 315/45-16 | 315/30-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.16 (689.9) | 25.44 (646.2) | -1.72 (-43.7) -6.3% |
| Width inches (mm) | 12.4 (315) | 12.4 (315) | 0 (0) 0% |
| Circum. inches (mm) | 85.33 (2167.38) | 79.93 (2030.1) | -5.41 (-137.29) -6.3% |
| Sidewall Height inches (mm) | 5.58 (141.75) | 3.72 (94.5) | -1.86 (-47.25) -33.3% |
| Revolutions per mile (km) | 742.53 (461.38) | 792.74 (492.59) | 50.21 (31.2) 6.8% |
315/30-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.73 mph (30.15 km/h) |
| 25 mph (40.23 km/h) | 23.42 mph (37.69 km/h) |
| 30 mph (48.28 km/h) | 28.1 mph (45.22 km/h) |
| 35 mph (56.33 km/h) | 32.78 mph (52.76 km/h) |
| 40 mph (64.37 km/h) | 37.47 mph (60.3 km/h) |
| 45 mph (72.42 km/h) | 42.15 mph (67.83 km/h) |
| 50 mph (80.47 km/h) | 46.83 mph (75.37 km/h) |
| 55 mph (88.51 km/h) | 51.52 mph (82.91 km/h) |
| 60 mph (96.56 km/h) | 56.2 mph (90.44 km/h) |
| 65 mph (104.61 km/h) | 60.88 mph (97.98 km/h) |
| 70 mph (112.65 km/h) | 65.57 mph (105.52 km/h) |
| 75 mph (120.7 km/h) | 70.25 mph (113.06 km/h) |
| 80 mph (128.75 km/h) | 74.93 mph (120.59 km/h) |
| 85 mph (136.79 km/h) | 79.62 mph (128.13 km/h) |
| 90 mph (144.84 km/h) | 84.3 mph (135.67 km/h) |
| 95 mph (152.89 km/h) | 88.98 mph (143.2 km/h) |
| 100 mph (160.93 km/h) | 93.67 mph (150.74 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2017 | 2344 | 2524 | 2635 | 2756 | 2841 | 2936 | 3048 | 3202 | 3357 | 3528 | 3666 | 3915 | 4189 | 4404 | 4541 | 4619 | 4902 | 5297 | 6155 |
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