Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 130/60-21 | 180/55-16 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.14 (689.4) | 23.8 (604.4) | -3.35 (-85) -12.3% |
| Width inches (mm) | 5.12 (130) | 7.09 (180) | 1.97 (50) 38.5% |
| Circum. inches (mm) | 85.27 (2165.81) | 74.76 (1898.78) | -10.51 (-267.04) -12.3% |
| Sidewall Height inches (mm) | 3.07 (78) | 3.9 (99) | 0.83 (21) 26.9% |
| Revolutions per mile (km) | 743.07 (461.72) | 847.57 (526.65) | 104.5 (64.93) 14.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 17.53 mph (28.22 km/h) |
| 25 mph (40.23 km/h) | 21.92 mph (35.27 km/h) |
| 30 mph (48.28 km/h) | 26.3 mph (42.33 km/h) |
| 35 mph (56.33 km/h) | 30.68 mph (49.38 km/h) |
| 40 mph (64.37 km/h) | 35.07 mph (56.44 km/h) |
| 45 mph (72.42 km/h) | 39.45 mph (63.49 km/h) |
| 50 mph (80.47 km/h) | 43.84 mph (70.55 km/h) |
| 55 mph (88.51 km/h) | 48.22 mph (77.6 km/h) |
| 60 mph (96.56 km/h) | 52.6 mph (84.66 km/h) |
| 65 mph (104.61 km/h) | 56.99 mph (91.71 km/h) |
| 70 mph (112.65 km/h) | 61.37 mph (98.76 km/h) |
| 75 mph (120.7 km/h) | 65.75 mph (105.82 km/h) |
| 80 mph (128.75 km/h) | 70.14 mph (112.87 km/h) |
| 85 mph (136.79 km/h) | 74.52 mph (119.93 km/h) |
| 90 mph (144.84 km/h) | 78.9 mph (126.98 km/h) |
| 95 mph (152.89 km/h) | 83.29 mph (134.04 km/h) |
| 100 mph (160.93 km/h) | 87.67 mph (141.09 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
