Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 125/80-15 | 135/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 22.87 (581) | 25.44 (646.2) | 2.57 (65.2) 11.2% |
| Width inches (mm) | 4.92 (125) | 5.31 (135) | 0.39 (10) 8% |
| Circum. inches (mm) | 71.86 (1825.27) | 79.93 (2030.1) | 8.06 (204.83) 11.2% |
| Sidewall Height inches (mm) | 3.94 (100) | 3.72 (94.5) | -0.22 (-5.5) -5.5% |
| Revolutions per mile (km) | 881.7 (547.86) | 792.74 (492.59) | -88.96 (-55.28) -10.1% |
135/70-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.24 mph (35.8 km/h) |
| 25 mph (40.23 km/h) | 27.81 mph (44.75 km/h) |
| 30 mph (48.28 km/h) | 33.37 mph (53.7 km/h) |
| 35 mph (56.33 km/h) | 38.93 mph (62.65 km/h) |
| 40 mph (64.37 km/h) | 44.49 mph (71.6 km/h) |
| 45 mph (72.42 km/h) | 50.05 mph (80.55 km/h) |
| 50 mph (80.47 km/h) | 55.61 mph (89.5 km/h) |
| 55 mph (88.51 km/h) | 61.17 mph (98.45 km/h) |
| 60 mph (96.56 km/h) | 66.73 mph (107.4 km/h) |
| 65 mph (104.61 km/h) | 72.29 mph (116.35 km/h) |
| 70 mph (112.65 km/h) | 77.86 mph (125.3 km/h) |
| 75 mph (120.7 km/h) | 83.42 mph (134.25 km/h) |
| 80 mph (128.75 km/h) | 88.98 mph (143.2 km/h) |
| 85 mph (136.79 km/h) | 94.54 mph (152.15 km/h) |
| 90 mph (144.84 km/h) | 100.1 mph (161.1 km/h) |
| 95 mph (152.89 km/h) | 105.66 mph (170.05 km/h) |
| 100 mph (160.93 km/h) | 111.22 mph (178.99 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
