Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 180/70-18 | 180/55-16 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.92 (709.2) | 23.8 (604.4) | -4.13 (-104.8) -14.8% |
| Width inches (mm) | 7.09 (180) | 7.09 (180) | 0 (0) 0% |
| Circum. inches (mm) | 87.72 (2228.02) | 74.76 (1898.78) | -12.96 (-329.24) -14.8% |
| Sidewall Height inches (mm) | 4.96 (126) | 3.9 (99) | -1.06 (-27) -21.4% |
| Revolutions per mile (km) | 722.32 (448.83) | 847.57 (526.65) | 125.25 (77.82) 17.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 17.04 mph (27.43 km/h) |
| 25 mph (40.23 km/h) | 21.31 mph (34.29 km/h) |
| 30 mph (48.28 km/h) | 25.57 mph (41.15 km/h) |
| 35 mph (56.33 km/h) | 29.83 mph (48 km/h) |
| 40 mph (64.37 km/h) | 34.09 mph (54.86 km/h) |
| 45 mph (72.42 km/h) | 38.35 mph (61.72 km/h) |
| 50 mph (80.47 km/h) | 42.61 mph (68.58 km/h) |
| 55 mph (88.51 km/h) | 46.87 mph (75.43 km/h) |
| 60 mph (96.56 km/h) | 51.13 mph (82.29 km/h) |
| 65 mph (104.61 km/h) | 55.39 mph (89.15 km/h) |
| 70 mph (112.65 km/h) | 59.66 mph (96.01 km/h) |
| 75 mph (120.7 km/h) | 63.92 mph (102.86 km/h) |
| 80 mph (128.75 km/h) | 68.18 mph (109.72 km/h) |
| 85 mph (136.79 km/h) | 72.44 mph (116.58 km/h) |
| 90 mph (144.84 km/h) | 76.7 mph (123.44 km/h) |
| 95 mph (152.89 km/h) | 80.96 mph (130.3 km/h) |
| 100 mph (160.93 km/h) | 85.22 mph (137.15 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
