Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 185/75-16 | 31/9.5-16 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.93 (683.9) | 30.99 (787.18) | 4.07 (103.28) 15.1% |
| Width inches (mm) | 7.28 (185) | 9.49 (241) | 2.2 (56) 30.3% |
| Circum. inches (mm) | 84.59 (2148.54) | 97.36 (2473) | 12.77 (324.46) 15.1% |
| Sidewall Height inches (mm) | 5.46 (138.75) | 7.5 (190.39) | 2.03 (51.64) 37.2% |
| Revolutions per mile (km) | 749.04 (465.43) | 650.77 (404.37) | -98.28 (-61.07) -13.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.02 mph (37.05 km/h) |
| 25 mph (40.23 km/h) | 28.78 mph (46.31 km/h) |
| 30 mph (48.28 km/h) | 34.53 mph (55.57 km/h) |
| 35 mph (56.33 km/h) | 40.29 mph (64.83 km/h) |
| 40 mph (64.37 km/h) | 46.04 mph (74.1 km/h) |
| 45 mph (72.42 km/h) | 51.8 mph (83.36 km/h) |
| 50 mph (80.47 km/h) | 57.55 mph (92.62 km/h) |
| 55 mph (88.51 km/h) | 63.31 mph (101.88 km/h) |
| 60 mph (96.56 km/h) | 69.06 mph (111.14 km/h) |
| 65 mph (104.61 km/h) | 74.82 mph (120.41 km/h) |
| 70 mph (112.65 km/h) | 80.57 mph (129.67 km/h) |
| 75 mph (120.7 km/h) | 86.33 mph (138.93 km/h) |
| 80 mph (128.75 km/h) | 92.08 mph (148.19 km/h) |
| 85 mph (136.79 km/h) | 97.84 mph (157.45 km/h) |
| 90 mph (144.84 km/h) | 103.59 mph (166.71 km/h) |
| 95 mph (152.89 km/h) | 109.35 mph (175.98 km/h) |
| 100 mph (160.93 km/h) | 115.1 mph (185.24 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1656 | 1924 | 2072 | 2163 | 2262 | 2333 | 2410 | 2502 | 2629 | 2755 | 2896 | 3009 | 3213 | 3439 | 3615 | 3728 | 3791 | 4024 | 4348 | 5053 |
Better Fuel Economy Factory Ratios Increased Power
