Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/90-18 | 325/90-16 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.4 (772.2) | 39.03 (991.4) | 8.63 (219.2) 28.4% |
| Width inches (mm) | 6.89 (175) | 12.8 (325) | 5.91 (150) 85.7% |
| Circum. inches (mm) | 95.51 (2425.94) | 122.62 (3114.57) | 27.11 (688.64) 28.4% |
| Sidewall Height inches (mm) | 6.2 (157.5) | 11.52 (292.5) | 5.31 (135) 85.7% |
| Revolutions per mile (km) | 663.39 (412.21) | 516.71 (321.07) | -146.68 (-91.14) -22.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 25.68 mph (41.32 km/h) |
| 25 mph (40.23 km/h) | 32.1 mph (51.65 km/h) |
| 30 mph (48.28 km/h) | 38.52 mph (61.99 km/h) |
| 35 mph (56.33 km/h) | 44.94 mph (72.32 km/h) |
| 40 mph (64.37 km/h) | 51.35 mph (82.65 km/h) |
| 45 mph (72.42 km/h) | 57.77 mph (92.98 km/h) |
| 50 mph (80.47 km/h) | 64.19 mph (103.31 km/h) |
| 55 mph (88.51 km/h) | 70.61 mph (113.64 km/h) |
| 60 mph (96.56 km/h) | 77.03 mph (123.97 km/h) |
| 65 mph (104.61 km/h) | 83.45 mph (134.3 km/h) |
| 70 mph (112.65 km/h) | 89.87 mph (144.63 km/h) |
| 75 mph (120.7 km/h) | 96.29 mph (154.96 km/h) |
| 80 mph (128.75 km/h) | 102.71 mph (165.29 km/h) |
| 85 mph (136.79 km/h) | 109.13 mph (175.63 km/h) |
| 90 mph (144.84 km/h) | 115.55 mph (185.96 km/h) |
| 95 mph (152.89 km/h) | 121.97 mph (196.29 km/h) |
| 100 mph (160.93 km/h) | 128.39 mph (206.62 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1315 | 1528 | 1645 | 1718 | 1796 | 1852 | 1914 | 1986 | 2087 | 2188 | 2300 | 2389 | 2552 | 2731 | 2870 | 2960 | 3010 | 3195 | 3452 | 4012 |
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