Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 135/80-17 | 135/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.5 (647.8) | 25.44 (646.2) | -0.06 (-1.6) -0.2% |
| Width inches (mm) | 5.31 (135) | 5.31 (135) | 0 (0) 0% |
| Circum. inches (mm) | 80.12 (2035.12) | 79.93 (2030.1) | -0.2 (-5.03) -0.2% |
| Sidewall Height inches (mm) | 4.25 (108) | 3.72 (94.5) | -0.53 (-13.5) -12.5% |
| Revolutions per mile (km) | 790.78 (491.37) | 792.74 (492.59) | 1.96 (1.22) 0.2% |
135/70-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.95 mph (32.11 km/h) |
| 25 mph (40.23 km/h) | 24.94 mph (40.13 km/h) |
| 30 mph (48.28 km/h) | 29.93 mph (48.16 km/h) |
| 35 mph (56.33 km/h) | 34.91 mph (56.19 km/h) |
| 40 mph (64.37 km/h) | 39.9 mph (64.21 km/h) |
| 45 mph (72.42 km/h) | 44.89 mph (72.24 km/h) |
| 50 mph (80.47 km/h) | 49.88 mph (80.27 km/h) |
| 55 mph (88.51 km/h) | 54.86 mph (88.3 km/h) |
| 60 mph (96.56 km/h) | 59.85 mph (96.32 km/h) |
| 65 mph (104.61 km/h) | 64.84 mph (104.35 km/h) |
| 70 mph (112.65 km/h) | 69.83 mph (112.38 km/h) |
| 75 mph (120.7 km/h) | 74.81 mph (120.4 km/h) |
| 80 mph (128.75 km/h) | 79.8 mph (128.43 km/h) |
| 85 mph (136.79 km/h) | 84.79 mph (136.46 km/h) |
| 90 mph (144.84 km/h) | 89.78 mph (144.48 km/h) |
| 95 mph (152.89 km/h) | 94.77 mph (152.51 km/h) |
| 100 mph (160.93 km/h) | 99.75 mph (160.54 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2017 | 2344 | 2524 | 2635 | 2756 | 2841 | 2936 | 3048 | 3202 | 3357 | 3528 | 3666 | 3915 | 4189 | 4404 | 4541 | 4619 | 4902 | 5297 | 6155 |
Better Fuel Economy Factory Ratios Increased Power
