Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 180/60-18 | 180/55-16 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.5 (673.2) | 23.8 (604.4) | -2.71 (-68.8) -10.2% |
| Width inches (mm) | 7.09 (180) | 7.09 (180) | 0 (0) 0% |
| Circum. inches (mm) | 83.26 (2114.92) | 74.76 (1898.78) | -8.51 (-216.14) -10.2% |
| Sidewall Height inches (mm) | 4.25 (108) | 3.9 (99) | -0.35 (-9) -8.3% |
| Revolutions per mile (km) | 760.95 (472.83) | 847.57 (526.65) | 86.62 (53.82) 11.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 17.96 mph (28.9 km/h) |
| 25 mph (40.23 km/h) | 22.45 mph (36.12 km/h) |
| 30 mph (48.28 km/h) | 26.93 mph (43.35 km/h) |
| 35 mph (56.33 km/h) | 31.42 mph (50.57 km/h) |
| 40 mph (64.37 km/h) | 35.91 mph (57.79 km/h) |
| 45 mph (72.42 km/h) | 40.4 mph (65.02 km/h) |
| 50 mph (80.47 km/h) | 44.89 mph (72.24 km/h) |
| 55 mph (88.51 km/h) | 49.38 mph (79.47 km/h) |
| 60 mph (96.56 km/h) | 53.87 mph (86.69 km/h) |
| 65 mph (104.61 km/h) | 58.36 mph (93.92 km/h) |
| 70 mph (112.65 km/h) | 62.85 mph (101.14 km/h) |
| 75 mph (120.7 km/h) | 67.34 mph (108.37 km/h) |
| 80 mph (128.75 km/h) | 71.82 mph (115.59 km/h) |
| 85 mph (136.79 km/h) | 76.31 mph (122.81 km/h) |
| 90 mph (144.84 km/h) | 80.8 mph (130.04 km/h) |
| 95 mph (152.89 km/h) | 85.29 mph (137.26 km/h) |
| 100 mph (160.93 km/h) | 89.78 mph (144.49 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2157 | 2506 | 2698 | 2818 | 2946 | 3038 | 3139 | 3258 | 3424 | 3589 | 3772 | 3919 | 4185 | 4479 | 4708 | 4855 | 4938 | 5241 | 5663 | 6581 |
Better Fuel Economy Factory Ratios Increased Power
