Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 32/10-17 | 40/12.5-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32 (812.8) | 40.04 (1016.92) | 8.04 (204.12) 25.1% |
| Width inches (mm) | 10 (254) | 12.52 (318) | 2.52 (64) 25.2% |
| Circum. inches (mm) | 100.53 (2553.49) | 125.78 (3194.75) | 25.25 (641.26) 25.1% |
| Sidewall Height inches (mm) | 7.5 (190.5) | 11.52 (292.56) | 4.02 (102.06) 53.6% |
| Revolutions per mile (km) | 630.25 (391.62) | 503.75 (313.01) | -126.51 (-78.61) -20.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 25.02 mph (40.27 km/h) |
| 25 mph (40.23 km/h) | 31.28 mph (50.34 km/h) |
| 30 mph (48.28 km/h) | 37.53 mph (60.41 km/h) |
| 35 mph (56.33 km/h) | 43.79 mph (70.47 km/h) |
| 40 mph (64.37 km/h) | 50.05 mph (80.54 km/h) |
| 45 mph (72.42 km/h) | 56.3 mph (90.61 km/h) |
| 50 mph (80.47 km/h) | 62.56 mph (100.68 km/h) |
| 55 mph (88.51 km/h) | 68.81 mph (110.74 km/h) |
| 60 mph (96.56 km/h) | 75.07 mph (120.81 km/h) |
| 65 mph (104.61 km/h) | 81.32 mph (130.88 km/h) |
| 70 mph (112.65 km/h) | 87.58 mph (140.95 km/h) |
| 75 mph (120.7 km/h) | 93.83 mph (151.01 km/h) |
| 80 mph (128.75 km/h) | 100.09 mph (161.08 km/h) |
| 85 mph (136.79 km/h) | 106.35 mph (171.15 km/h) |
| 90 mph (144.84 km/h) | 112.6 mph (181.22 km/h) |
| 95 mph (152.89 km/h) | 118.86 mph (191.28 km/h) |
| 100 mph (160.93 km/h) | 125.11 mph (201.35 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1282 | 1489 | 1604 | 1675 | 1751 | 1806 | 1866 | 1937 | 2035 | 2133 | 2242 | 2329 | 2488 | 2662 | 2798 | 2886 | 2935 | 3115 | 3366 | 3911 |
Better Fuel Economy Factory Ratios Increased Power
