Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 200/50-18 | 185/40-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.87 (657.2) | 23.83 (605.2) | -2.05 (-52) -7.9% |
| Width inches (mm) | 7.87 (200) | 7.28 (185) | -0.59 (-15) -7.5% |
| Circum. inches (mm) | 81.29 (2064.65) | 74.85 (1901.29) | -6.43 (-163.36) -7.9% |
| Sidewall Height inches (mm) | 3.94 (100) | 2.91 (74) | -1.02 (-26) -26% |
| Revolutions per mile (km) | 779.47 (484.34) | 846.45 (525.96) | 66.97 (41.62) 8.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.42 mph (29.64 km/h) |
| 25 mph (40.23 km/h) | 23.02 mph (37.05 km/h) |
| 30 mph (48.28 km/h) | 27.63 mph (44.46 km/h) |
| 35 mph (56.33 km/h) | 32.23 mph (51.87 km/h) |
| 40 mph (64.37 km/h) | 36.84 mph (59.28 km/h) |
| 45 mph (72.42 km/h) | 41.44 mph (66.69 km/h) |
| 50 mph (80.47 km/h) | 46.04 mph (74.1 km/h) |
| 55 mph (88.51 km/h) | 50.65 mph (81.51 km/h) |
| 60 mph (96.56 km/h) | 55.25 mph (88.92 km/h) |
| 65 mph (104.61 km/h) | 59.86 mph (96.33 km/h) |
| 70 mph (112.65 km/h) | 64.46 mph (103.74 km/h) |
| 75 mph (120.7 km/h) | 69.07 mph (111.15 km/h) |
| 80 mph (128.75 km/h) | 73.67 mph (118.56 km/h) |
| 85 mph (136.79 km/h) | 78.27 mph (125.97 km/h) |
| 90 mph (144.84 km/h) | 82.88 mph (133.38 km/h) |
| 95 mph (152.89 km/h) | 87.48 mph (140.79 km/h) |
| 100 mph (160.93 km/h) | 92.09 mph (148.2 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2154 | 2502 | 2695 | 2814 | 2942 | 3034 | 3135 | 3254 | 3419 | 3584 | 3767 | 3914 | 4180 | 4473 | 4702 | 4849 | 4931 | 5234 | 5656 | 6572 |
Better Fuel Economy Factory Ratios Increased Power
