Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 120/80-14 | 180/80-14 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.56 (547.6) | 25.34 (643.6) | 3.78 (96) 17.5% |
| Width inches (mm) | 4.72 (120) | 7.09 (180) | 2.36 (60) 50% |
| Circum. inches (mm) | 67.73 (1720.34) | 79.6 (2021.93) | 11.87 (301.59) 17.5% |
| Sidewall Height inches (mm) | 3.78 (96) | 5.67 (144) | 1.89 (48) 50% |
| Revolutions per mile (km) | 935.48 (581.28) | 795.94 (494.58) | -139.54 (-86.7) -14.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.51 mph (37.83 km/h) |
| 25 mph (40.23 km/h) | 29.38 mph (47.29 km/h) |
| 30 mph (48.28 km/h) | 35.26 mph (56.74 km/h) |
| 35 mph (56.33 km/h) | 41.14 mph (66.2 km/h) |
| 40 mph (64.37 km/h) | 47.01 mph (75.66 km/h) |
| 45 mph (72.42 km/h) | 52.89 mph (85.12 km/h) |
| 50 mph (80.47 km/h) | 58.77 mph (94.57 km/h) |
| 55 mph (88.51 km/h) | 64.64 mph (104.03 km/h) |
| 60 mph (96.56 km/h) | 70.52 mph (113.49 km/h) |
| 65 mph (104.61 km/h) | 76.4 mph (122.95 km/h) |
| 70 mph (112.65 km/h) | 82.27 mph (132.4 km/h) |
| 75 mph (120.7 km/h) | 88.15 mph (141.86 km/h) |
| 80 mph (128.75 km/h) | 94.02 mph (151.32 km/h) |
| 85 mph (136.79 km/h) | 99.9 mph (160.78 km/h) |
| 90 mph (144.84 km/h) | 105.78 mph (170.23 km/h) |
| 95 mph (152.89 km/h) | 111.65 mph (179.69 km/h) |
| 100 mph (160.93 km/h) | 117.53 mph (189.15 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 2353 | 2534 | 2646 | 2767 | 2853 | 2948 | 3060 | 3215 | 3370 | 3543 | 3680 | 3930 | 4206 | 4422 | 4560 | 4637 | 4922 | 5318 | 6180 |
Better Fuel Economy Factory Ratios Increased Power
