Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 135/70-18 | 340/80-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.44 (646.2) | 39.42 (1001.2) | 13.98 (355) 54.9% |
| Width inches (mm) | 5.31 (135) | 13.39 (340) | 8.07 (205) 151.9% |
| Circum. inches (mm) | 79.93 (2030.1) | 123.83 (3145.36) | 43.91 (1115.27) 54.9% |
| Sidewall Height inches (mm) | 3.72 (94.5) | 10.71 (272) | 6.99 (177.5) 187.8% |
| Revolutions per mile (km) | 792.74 (492.59) | 511.66 (317.93) | -281.09 (-174.66) -35.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 30.99 mph (49.87 km/h) |
| 25 mph (40.23 km/h) | 38.73 mph (62.34 km/h) |
| 30 mph (48.28 km/h) | 46.48 mph (74.8 km/h) |
| 35 mph (56.33 km/h) | 54.23 mph (87.27 km/h) |
| 40 mph (64.37 km/h) | 61.97 mph (99.74 km/h) |
| 45 mph (72.42 km/h) | 69.72 mph (112.21 km/h) |
| 50 mph (80.47 km/h) | 77.47 mph (124.67 km/h) |
| 55 mph (88.51 km/h) | 85.22 mph (137.14 km/h) |
| 60 mph (96.56 km/h) | 92.96 mph (149.61 km/h) |
| 65 mph (104.61 km/h) | 100.71 mph (162.08 km/h) |
| 70 mph (112.65 km/h) | 108.46 mph (174.54 km/h) |
| 75 mph (120.7 km/h) | 116.2 mph (187.01 km/h) |
| 80 mph (128.75 km/h) | 123.95 mph (199.48 km/h) |
| 85 mph (136.79 km/h) | 131.7 mph (211.94 km/h) |
| 90 mph (144.84 km/h) | 139.44 mph (224.41 km/h) |
| 95 mph (152.89 km/h) | 147.19 mph (236.88 km/h) |
| 100 mph (160.93 km/h) | 154.94 mph (249.35 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1302 | 1513 | 1629 | 1701 | 1779 | 1834 | 1895 | 1967 | 2067 | 2166 | 2277 | 2366 | 2527 | 2704 | 2842 | 2931 | 2981 | 3164 | 3419 | 3973 |
Better Fuel Economy Factory Ratios Increased Power
