Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 110/80-18 | 120/90-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.93 (633.2) | 26.5 (673.2) | 1.57 (40) 6.3% |
| Width inches (mm) | 4.33 (110) | 4.72 (120) | 0.39 (10) 9.1% |
| Circum. inches (mm) | 78.32 (1989.26) | 83.26 (2114.92) | 4.95 (125.66) 6.3% |
| Sidewall Height inches (mm) | 3.46 (88) | 4.25 (108) | 0.79 (20) 22.7% |
| Revolutions per mile (km) | 809.02 (502.7) | 760.95 (472.83) | -48.07 (-29.87) -5.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.26 mph (34.22 km/h) |
| 25 mph (40.23 km/h) | 26.58 mph (42.78 km/h) |
| 30 mph (48.28 km/h) | 31.9 mph (51.33 km/h) |
| 35 mph (56.33 km/h) | 37.21 mph (59.89 km/h) |
| 40 mph (64.37 km/h) | 42.53 mph (68.44 km/h) |
| 45 mph (72.42 km/h) | 47.84 mph (77 km/h) |
| 50 mph (80.47 km/h) | 53.16 mph (85.55 km/h) |
| 55 mph (88.51 km/h) | 58.47 mph (94.11 km/h) |
| 60 mph (96.56 km/h) | 63.79 mph (102.66 km/h) |
| 65 mph (104.61 km/h) | 69.11 mph (111.22 km/h) |
| 70 mph (112.65 km/h) | 74.42 mph (119.77 km/h) |
| 75 mph (120.7 km/h) | 79.74 mph (128.33 km/h) |
| 80 mph (128.75 km/h) | 85.05 mph (136.88 km/h) |
| 85 mph (136.79 km/h) | 90.37 mph (145.44 km/h) |
| 90 mph (144.84 km/h) | 95.69 mph (153.99 km/h) |
| 95 mph (152.89 km/h) | 101 mph (162.55 km/h) |
| 100 mph (160.93 km/h) | 106.32 mph (171.1 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1936 | 2250 | 2423 | 2530 | 2645 | 2728 | 2818 | 2925 | 3074 | 3222 | 3387 | 3519 | 3758 | 4021 | 4227 | 4359 | 4433 | 4705 | 5084 | 5908 |
Better Fuel Economy Factory Ratios Increased Power
