Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 185/50-17 | 185/40-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.28 (616.8) | 22.83 (579.8) | -1.46 (-37) -6% |
| Width inches (mm) | 7.28 (185) | 7.28 (185) | 0 (0) 0% |
| Circum. inches (mm) | 76.29 (1937.73) | 71.71 (1821.5) | -4.58 (-116.24) -6% |
| Sidewall Height inches (mm) | 3.64 (92.5) | 2.91 (74) | -0.73 (-18.5) -20% |
| Revolutions per mile (km) | 830.53 (516.07) | 883.53 (549) | 53 (32.93) 6.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.8 mph (30.26 km/h) |
| 25 mph (40.23 km/h) | 23.5 mph (37.82 km/h) |
| 30 mph (48.28 km/h) | 28.2 mph (45.38 km/h) |
| 35 mph (56.33 km/h) | 32.9 mph (52.95 km/h) |
| 40 mph (64.37 km/h) | 37.6 mph (60.51 km/h) |
| 45 mph (72.42 km/h) | 42.3 mph (68.08 km/h) |
| 50 mph (80.47 km/h) | 47 mph (75.64 km/h) |
| 55 mph (88.51 km/h) | 51.7 mph (83.2 km/h) |
| 60 mph (96.56 km/h) | 56.4 mph (90.77 km/h) |
| 65 mph (104.61 km/h) | 61.1 mph (98.33 km/h) |
| 70 mph (112.65 km/h) | 65.8 mph (105.9 km/h) |
| 75 mph (120.7 km/h) | 70.5 mph (113.46 km/h) |
| 80 mph (128.75 km/h) | 75.2 mph (121.02 km/h) |
| 85 mph (136.79 km/h) | 79.9 mph (128.59 km/h) |
| 90 mph (144.84 km/h) | 84.6 mph (136.15 km/h) |
| 95 mph (152.89 km/h) | 89.3 mph (143.72 km/h) |
| 100 mph (160.93 km/h) | 94 mph (151.28 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2248 | 2612 | 2813 | 2937 | 3071 | 3167 | 3272 | 3397 | 3569 | 3741 | 3932 | 4085 | 4363 | 4669 | 4908 | 5061 | 5147 | 5463 | 5903 | 6860 |
Better Fuel Economy Factory Ratios Increased Power
