Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 37/12.5-18 | 315/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 37.03 (940.56) | 35.36 (898.2) | -1.67 (-42.36) -4.5% |
| Width inches (mm) | 12.52 (318) | 12.4 (315) | -0.12 (-3) -0.9% |
| Circum. inches (mm) | 116.33 (2954.86) | 111.09 (2821.78) | -5.24 (-133.08) -4.5% |
| Sidewall Height inches (mm) | 9.51 (241.68) | 8.68 (220.5) | -0.83 (-21.18) -8.8% |
| Revolutions per mile (km) | 544.64 (338.43) | 570.33 (354.39) | 25.69 (15.96) 4.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.1 mph (30.74 km/h) |
| 25 mph (40.23 km/h) | 23.87 mph (38.42 km/h) |
| 30 mph (48.28 km/h) | 28.65 mph (46.11 km/h) |
| 35 mph (56.33 km/h) | 33.42 mph (53.79 km/h) |
| 40 mph (64.37 km/h) | 38.2 mph (61.47 km/h) |
| 45 mph (72.42 km/h) | 42.97 mph (69.16 km/h) |
| 50 mph (80.47 km/h) | 47.75 mph (76.84 km/h) |
| 55 mph (88.51 km/h) | 52.52 mph (84.53 km/h) |
| 60 mph (96.56 km/h) | 57.3 mph (92.21 km/h) |
| 65 mph (104.61 km/h) | 62.07 mph (99.9 km/h) |
| 70 mph (112.65 km/h) | 66.85 mph (107.58 km/h) |
| 75 mph (120.7 km/h) | 71.62 mph (115.27 km/h) |
| 80 mph (128.75 km/h) | 76.4 mph (122.95 km/h) |
| 85 mph (136.79 km/h) | 81.17 mph (130.63 km/h) |
| 90 mph (144.84 km/h) | 85.95 mph (138.32 km/h) |
| 95 mph (152.89 km/h) | 90.72 mph (146 km/h) |
| 100 mph (160.93 km/h) | 95.5 mph (153.69 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1451 | 1686 | 1816 | 1896 | 1983 | 2044 | 2112 | 2193 | 2304 | 2415 | 2538 | 2637 | 2816 | 3014 | 3168 | 3267 | 3323 | 3527 | 3811 | 4428 |
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