Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 180/60-18 | 205/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.5 (673.2) | 28.49 (723.7) | 1.99 (50.5) 7.5% |
| Width inches (mm) | 7.09 (180) | 8.07 (205) | 0.98 (25) 13.9% |
| Circum. inches (mm) | 83.26 (2114.92) | 89.51 (2273.57) | 6.25 (158.65) 7.5% |
| Sidewall Height inches (mm) | 4.25 (108) | 5.25 (133.25) | 0.99 (25.25) 23.4% |
| Revolutions per mile (km) | 760.95 (472.83) | 707.85 (439.84) | -53.1 (-32.99) -7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.5 mph (34.6 km/h) |
| 25 mph (40.23 km/h) | 26.88 mph (43.25 km/h) |
| 30 mph (48.28 km/h) | 32.25 mph (51.9 km/h) |
| 35 mph (56.33 km/h) | 37.63 mph (60.55 km/h) |
| 40 mph (64.37 km/h) | 43 mph (69.2 km/h) |
| 45 mph (72.42 km/h) | 48.38 mph (77.85 km/h) |
| 50 mph (80.47 km/h) | 53.75 mph (86.5 km/h) |
| 55 mph (88.51 km/h) | 59.13 mph (95.15 km/h) |
| 60 mph (96.56 km/h) | 64.5 mph (103.8 km/h) |
| 65 mph (104.61 km/h) | 69.88 mph (112.45 km/h) |
| 70 mph (112.65 km/h) | 75.25 mph (121.11 km/h) |
| 75 mph (120.7 km/h) | 80.63 mph (129.76 km/h) |
| 80 mph (128.75 km/h) | 86 mph (138.41 km/h) |
| 85 mph (136.79 km/h) | 91.38 mph (147.06 km/h) |
| 90 mph (144.84 km/h) | 96.75 mph (155.71 km/h) |
| 95 mph (152.89 km/h) | 102.13 mph (164.36 km/h) |
| 100 mph (160.93 km/h) | 107.5 mph (173.01 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1801 | 2093 | 2254 | 2353 | 2461 | 2537 | 2622 | 2721 | 2859 | 2997 | 3150 | 3273 | 3495 | 3741 | 3932 | 4055 | 4124 | 4377 | 4729 | 5496 |
Better Fuel Economy Factory Ratios Increased Power
