Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 130/80-18 | 180/80-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.19 (665.2) | 29.34 (745.2) | 3.15 (80) 12% |
| Width inches (mm) | 5.12 (130) | 7.09 (180) | 1.97 (50) 38.5% |
| Circum. inches (mm) | 82.28 (2089.79) | 92.17 (2341.11) | 9.89 (251.33) 12% |
| Sidewall Height inches (mm) | 4.09 (104) | 5.67 (144) | 1.57 (40) 38.5% |
| Revolutions per mile (km) | 770.1 (478.52) | 687.43 (427.15) | -82.67 (-51.37) -10.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.41 mph (36.06 km/h) |
| 25 mph (40.23 km/h) | 28.01 mph (45.07 km/h) |
| 30 mph (48.28 km/h) | 33.61 mph (54.09 km/h) |
| 35 mph (56.33 km/h) | 39.21 mph (63.1 km/h) |
| 40 mph (64.37 km/h) | 44.81 mph (72.12 km/h) |
| 45 mph (72.42 km/h) | 50.41 mph (81.13 km/h) |
| 50 mph (80.47 km/h) | 56.01 mph (90.14 km/h) |
| 55 mph (88.51 km/h) | 61.61 mph (99.16 km/h) |
| 60 mph (96.56 km/h) | 67.22 mph (108.17 km/h) |
| 65 mph (104.61 km/h) | 72.82 mph (117.19 km/h) |
| 70 mph (112.65 km/h) | 78.42 mph (126.2 km/h) |
| 75 mph (120.7 km/h) | 84.02 mph (135.22 km/h) |
| 80 mph (128.75 km/h) | 89.62 mph (144.23 km/h) |
| 85 mph (136.79 km/h) | 95.22 mph (153.25 km/h) |
| 90 mph (144.84 km/h) | 100.82 mph (162.26 km/h) |
| 95 mph (152.89 km/h) | 106.43 mph (171.27 km/h) |
| 100 mph (160.93 km/h) | 112.03 mph (180.29 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1749 | 2032 | 2189 | 2285 | 2390 | 2464 | 2546 | 2643 | 2777 | 2911 | 3060 | 3179 | 3395 | 3633 | 3819 | 3938 | 4005 | 4251 | 4593 | 5337 |
Better Fuel Economy Factory Ratios Increased Power
