Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 180/65-18 | 285/80-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.21 (691.2) | 35.95 (913.2) | 8.74 (222) 32.1% |
| Width inches (mm) | 7.09 (180) | 11.22 (285) | 4.13 (105) 58.3% |
| Circum. inches (mm) | 85.49 (2171.47) | 112.95 (2868.9) | 27.46 (697.43) 32.1% |
| Sidewall Height inches (mm) | 4.61 (117) | 8.98 (228) | 4.37 (111) 94.9% |
| Revolutions per mile (km) | 741.13 (460.52) | 560.96 (348.56) | -180.17 (-111.95) -24.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 26.42 mph (42.52 km/h) |
| 25 mph (40.23 km/h) | 33.03 mph (53.16 km/h) |
| 30 mph (48.28 km/h) | 39.64 mph (63.79 km/h) |
| 35 mph (56.33 km/h) | 46.24 mph (74.42 km/h) |
| 40 mph (64.37 km/h) | 52.85 mph (85.05 km/h) |
| 45 mph (72.42 km/h) | 59.45 mph (95.68 km/h) |
| 50 mph (80.47 km/h) | 66.06 mph (106.31 km/h) |
| 55 mph (88.51 km/h) | 72.66 mph (116.94 km/h) |
| 60 mph (96.56 km/h) | 79.27 mph (127.57 km/h) |
| 65 mph (104.61 km/h) | 85.88 mph (138.21 km/h) |
| 70 mph (112.65 km/h) | 92.48 mph (148.84 km/h) |
| 75 mph (120.7 km/h) | 99.09 mph (159.47 km/h) |
| 80 mph (128.75 km/h) | 105.69 mph (170.1 km/h) |
| 85 mph (136.79 km/h) | 112.3 mph (180.73 km/h) |
| 90 mph (144.84 km/h) | 118.91 mph (191.36 km/h) |
| 95 mph (152.89 km/h) | 125.51 mph (201.99 km/h) |
| 100 mph (160.93 km/h) | 132.12 mph (212.62 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1428 | 1658 | 1786 | 1865 | 1950 | 2011 | 2078 | 2156 | 2266 | 2375 | 2497 | 2594 | 2770 | 2964 | 3116 | 3213 | 3268 | 3469 | 3748 | 4356 |
Better Fuel Economy Factory Ratios Increased Power
