Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 180/80-14 | 120/70-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.34 (643.6) | 23.61 (599.8) | -1.72 (-43.8) -6.8% |
| Width inches (mm) | 7.09 (180) | 4.72 (120) | -2.36 (-60) -33.3% |
| Circum. inches (mm) | 79.6 (2021.93) | 74.19 (1884.33) | -5.42 (-137.6) -6.8% |
| Sidewall Height inches (mm) | 5.67 (144) | 3.31 (84) | -2.36 (-60) -41.7% |
| Revolutions per mile (km) | 795.94 (494.58) | 854.07 (530.69) | 58.12 (36.12) 7.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.64 mph (30 km/h) |
| 25 mph (40.23 km/h) | 23.3 mph (37.5 km/h) |
| 30 mph (48.28 km/h) | 27.96 mph (44.99 km/h) |
| 35 mph (56.33 km/h) | 32.62 mph (52.49 km/h) |
| 40 mph (64.37 km/h) | 37.28 mph (59.99 km/h) |
| 45 mph (72.42 km/h) | 41.94 mph (67.49 km/h) |
| 50 mph (80.47 km/h) | 46.6 mph (74.99 km/h) |
| 55 mph (88.51 km/h) | 51.26 mph (82.49 km/h) |
| 60 mph (96.56 km/h) | 55.92 mph (89.99 km/h) |
| 65 mph (104.61 km/h) | 60.58 mph (97.49 km/h) |
| 70 mph (112.65 km/h) | 65.24 mph (104.99 km/h) |
| 75 mph (120.7 km/h) | 69.9 mph (112.49 km/h) |
| 80 mph (128.75 km/h) | 74.56 mph (119.99 km/h) |
| 85 mph (136.79 km/h) | 79.22 mph (127.48 km/h) |
| 90 mph (144.84 km/h) | 83.88 mph (134.98 km/h) |
| 95 mph (152.89 km/h) | 88.53 mph (142.48 km/h) |
| 100 mph (160.93 km/h) | 93.19 mph (149.98 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2173 | 2525 | 2719 | 2839 | 2969 | 3061 | 3163 | 3283 | 3450 | 3616 | 3801 | 3949 | 4217 | 4513 | 4745 | 4893 | 4976 | 5281 | 5706 | 6631 |
Better Fuel Economy Factory Ratios Increased Power
