Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 130/60-21 | 180/70-16 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.14 (689.4) | 25.92 (658.4) | -1.22 (-31) -4.5% |
| Width inches (mm) | 5.12 (130) | 7.09 (180) | 1.97 (50) 38.5% |
| Circum. inches (mm) | 85.27 (2165.81) | 81.43 (2068.42) | -3.83 (-97.39) -4.5% |
| Sidewall Height inches (mm) | 3.07 (78) | 4.96 (126) | 1.89 (48) 61.5% |
| Revolutions per mile (km) | 743.07 (461.72) | 778.05 (483.46) | 34.99 (21.74) 4.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.1 mph (30.74 km/h) |
| 25 mph (40.23 km/h) | 23.88 mph (38.42 km/h) |
| 30 mph (48.28 km/h) | 28.65 mph (46.11 km/h) |
| 35 mph (56.33 km/h) | 33.43 mph (53.79 km/h) |
| 40 mph (64.37 km/h) | 38.2 mph (61.48 km/h) |
| 45 mph (72.42 km/h) | 42.98 mph (69.16 km/h) |
| 50 mph (80.47 km/h) | 47.75 mph (76.85 km/h) |
| 55 mph (88.51 km/h) | 52.53 mph (84.53 km/h) |
| 60 mph (96.56 km/h) | 57.3 mph (92.22 km/h) |
| 65 mph (104.61 km/h) | 62.08 mph (99.9 km/h) |
| 70 mph (112.65 km/h) | 66.85 mph (107.59 km/h) |
| 75 mph (120.7 km/h) | 71.63 mph (115.27 km/h) |
| 80 mph (128.75 km/h) | 76.4 mph (122.96 km/h) |
| 85 mph (136.79 km/h) | 81.18 mph (130.64 km/h) |
| 90 mph (144.84 km/h) | 85.95 mph (138.33 km/h) |
| 95 mph (152.89 km/h) | 90.73 mph (146.01 km/h) |
| 100 mph (160.93 km/h) | 95.5 mph (153.7 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1980 | 2300 | 2477 | 2587 | 2705 | 2789 | 2882 | 2991 | 3143 | 3294 | 3463 | 3598 | 3842 | 4112 | 4322 | 4457 | 4533 | 4811 | 5199 | 6041 |
Better Fuel Economy Factory Ratios Increased Power
