Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 180/70-18 | 205/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.92 (709.2) | 28.49 (723.7) | 0.57 (14.5) 2% |
| Width inches (mm) | 7.09 (180) | 8.07 (205) | 0.98 (25) 13.9% |
| Circum. inches (mm) | 87.72 (2228.02) | 89.51 (2273.57) | 1.79 (45.55) 2% |
| Sidewall Height inches (mm) | 4.96 (126) | 5.25 (133.25) | 0.29 (7.25) 5.8% |
| Revolutions per mile (km) | 722.32 (448.83) | 707.85 (439.84) | -14.47 (-8.99) -2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.41 mph (32.85 km/h) |
| 25 mph (40.23 km/h) | 25.51 mph (41.06 km/h) |
| 30 mph (48.28 km/h) | 30.61 mph (49.27 km/h) |
| 35 mph (56.33 km/h) | 35.72 mph (57.48 km/h) |
| 40 mph (64.37 km/h) | 40.82 mph (65.69 km/h) |
| 45 mph (72.42 km/h) | 45.92 mph (73.9 km/h) |
| 50 mph (80.47 km/h) | 51.02 mph (82.11 km/h) |
| 55 mph (88.51 km/h) | 56.12 mph (90.32 km/h) |
| 60 mph (96.56 km/h) | 61.23 mph (98.54 km/h) |
| 65 mph (104.61 km/h) | 66.33 mph (106.75 km/h) |
| 70 mph (112.65 km/h) | 71.43 mph (114.96 km/h) |
| 75 mph (120.7 km/h) | 76.53 mph (123.17 km/h) |
| 80 mph (128.75 km/h) | 81.64 mph (131.38 km/h) |
| 85 mph (136.79 km/h) | 86.74 mph (139.59 km/h) |
| 90 mph (144.84 km/h) | 91.84 mph (147.8 km/h) |
| 95 mph (152.89 km/h) | 96.94 mph (156.01 km/h) |
| 100 mph (160.93 km/h) | 102.04 mph (164.23 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
