Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 120/80-18 | 130/90-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.56 (649.2) | 27.21 (691.2) | 1.65 (42) 6.5% |
| Width inches (mm) | 4.72 (120) | 5.12 (130) | 0.39 (10) 8.3% |
| Circum. inches (mm) | 80.3 (2039.52) | 85.49 (2171.47) | 5.19 (131.95) 6.5% |
| Sidewall Height inches (mm) | 3.78 (96) | 4.61 (117) | 0.83 (21) 21.9% |
| Revolutions per mile (km) | 789.08 (490.31) | 741.13 (460.52) | -47.95 (-29.79) -6.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.29 mph (34.27 km/h) |
| 25 mph (40.23 km/h) | 26.62 mph (42.84 km/h) |
| 30 mph (48.28 km/h) | 31.94 mph (51.4 km/h) |
| 35 mph (56.33 km/h) | 37.26 mph (59.97 km/h) |
| 40 mph (64.37 km/h) | 42.59 mph (68.54 km/h) |
| 45 mph (72.42 km/h) | 47.91 mph (77.11 km/h) |
| 50 mph (80.47 km/h) | 53.23 mph (85.67 km/h) |
| 55 mph (88.51 km/h) | 58.56 mph (94.24 km/h) |
| 60 mph (96.56 km/h) | 63.88 mph (102.81 km/h) |
| 65 mph (104.61 km/h) | 69.21 mph (111.38 km/h) |
| 70 mph (112.65 km/h) | 74.53 mph (119.94 km/h) |
| 75 mph (120.7 km/h) | 79.85 mph (128.51 km/h) |
| 80 mph (128.75 km/h) | 85.18 mph (137.08 km/h) |
| 85 mph (136.79 km/h) | 90.5 mph (145.64 km/h) |
| 90 mph (144.84 km/h) | 95.82 mph (154.21 km/h) |
| 95 mph (152.89 km/h) | 101.15 mph (162.78 km/h) |
| 100 mph (160.93 km/h) | 106.47 mph (171.35 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1886 | 2191 | 2360 | 2464 | 2576 | 2657 | 2745 | 2849 | 2994 | 3138 | 3299 | 3427 | 3660 | 3917 | 4117 | 4246 | 4318 | 4583 | 4952 | 5754 |
Better Fuel Economy Factory Ratios Increased Power
