Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 100/80-18 | 120/80-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.3 (617.2) | 24.56 (623.8) | 0.26 (6.6) 1.1% |
| Width inches (mm) | 3.94 (100) | 4.72 (120) | 0.79 (20) 20% |
| Circum. inches (mm) | 76.34 (1938.99) | 77.15 (1959.73) | 0.82 (20.73) 1.1% |
| Sidewall Height inches (mm) | 3.15 (80) | 3.78 (96) | 0.63 (16) 20% |
| Revolutions per mile (km) | 829.99 (515.73) | 821.21 (510.27) | -8.78 (-5.46) -1.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.21 mph (32.53 km/h) |
| 25 mph (40.23 km/h) | 25.27 mph (40.66 km/h) |
| 30 mph (48.28 km/h) | 30.32 mph (48.8 km/h) |
| 35 mph (56.33 km/h) | 35.37 mph (56.93 km/h) |
| 40 mph (64.37 km/h) | 40.43 mph (65.06 km/h) |
| 45 mph (72.42 km/h) | 45.48 mph (73.2 km/h) |
| 50 mph (80.47 km/h) | 50.53 mph (81.33 km/h) |
| 55 mph (88.51 km/h) | 55.59 mph (89.46 km/h) |
| 60 mph (96.56 km/h) | 60.64 mph (97.59 km/h) |
| 65 mph (104.61 km/h) | 65.7 mph (105.73 km/h) |
| 70 mph (112.65 km/h) | 70.75 mph (113.86 km/h) |
| 75 mph (120.7 km/h) | 75.8 mph (121.99 km/h) |
| 80 mph (128.75 km/h) | 80.86 mph (130.12 km/h) |
| 85 mph (136.79 km/h) | 85.91 mph (138.26 km/h) |
| 90 mph (144.84 km/h) | 90.96 mph (146.39 km/h) |
| 95 mph (152.89 km/h) | 96.02 mph (154.52 km/h) |
| 100 mph (160.93 km/h) | 101.07 mph (162.66 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2090 | 2428 | 2614 | 2730 | 2855 | 2944 | 3041 | 3157 | 3317 | 3477 | 3655 | 3797 | 4055 | 4340 | 4562 | 4704 | 4784 | 5078 | 5487 | 6376 |
Better Fuel Economy Factory Ratios Increased Power
