Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/70-18 | 135/85-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.54 (674.2) | 27.04 (686.7) | 0.49 (12.5) 1.9% |
| Width inches (mm) | 6.1 (155) | 5.31 (135) | -0.79 (-20) -12.9% |
| Circum. inches (mm) | 83.39 (2118.06) | 84.93 (2157.33) | 1.55 (39.27) 1.9% |
| Sidewall Height inches (mm) | 4.27 (108.5) | 4.52 (114.75) | 0.25 (6.25) 5.8% |
| Revolutions per mile (km) | 759.82 (472.13) | 745.99 (463.53) | -13.83 (-8.59) -1.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.37 mph (32.78 km/h) |
| 25 mph (40.23 km/h) | 25.46 mph (40.98 km/h) |
| 30 mph (48.28 km/h) | 30.56 mph (49.18 km/h) |
| 35 mph (56.33 km/h) | 35.65 mph (57.37 km/h) |
| 40 mph (64.37 km/h) | 40.74 mph (65.57 km/h) |
| 45 mph (72.42 km/h) | 45.83 mph (73.76 km/h) |
| 50 mph (80.47 km/h) | 50.93 mph (81.96 km/h) |
| 55 mph (88.51 km/h) | 56.02 mph (90.16 km/h) |
| 60 mph (96.56 km/h) | 61.11 mph (98.35 km/h) |
| 65 mph (104.61 km/h) | 66.21 mph (106.55 km/h) |
| 70 mph (112.65 km/h) | 71.3 mph (114.74 km/h) |
| 75 mph (120.7 km/h) | 76.39 mph (122.94 km/h) |
| 80 mph (128.75 km/h) | 81.48 mph (131.13 km/h) |
| 85 mph (136.79 km/h) | 86.58 mph (139.33 km/h) |
| 90 mph (144.84 km/h) | 91.67 mph (147.53 km/h) |
| 95 mph (152.89 km/h) | 96.76 mph (155.72 km/h) |
| 100 mph (160.93 km/h) | 101.85 mph (163.92 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1898 | 2205 | 2375 | 2480 | 2593 | 2674 | 2763 | 2868 | 3013 | 3159 | 3320 | 3449 | 3684 | 3942 | 4144 | 4273 | 4346 | 4613 | 4984 | 5792 |
Better Fuel Economy Factory Ratios Increased Power
