Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/85-18 | 195/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.37 (720.7) | 28.75 (730.2) | 0.37 (9.5) 1.3% |
| Width inches (mm) | 6.1 (155) | 7.68 (195) | 1.57 (40) 25.8% |
| Circum. inches (mm) | 89.14 (2264.15) | 90.31 (2293.99) | 1.18 (29.85) 1.3% |
| Sidewall Height inches (mm) | 5.19 (131.75) | 5.37 (136.5) | 0.19 (4.75) 3.6% |
| Revolutions per mile (km) | 710.8 (441.67) | 701.55 (435.92) | -9.25 (-5.75) -1.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.26 mph (32.61 km/h) |
| 25 mph (40.23 km/h) | 25.33 mph (40.76 km/h) |
| 30 mph (48.28 km/h) | 30.4 mph (48.92 km/h) |
| 35 mph (56.33 km/h) | 35.46 mph (57.07 km/h) |
| 40 mph (64.37 km/h) | 40.53 mph (65.22 km/h) |
| 45 mph (72.42 km/h) | 45.59 mph (73.38 km/h) |
| 50 mph (80.47 km/h) | 50.66 mph (81.53 km/h) |
| 55 mph (88.51 km/h) | 55.72 mph (89.68 km/h) |
| 60 mph (96.56 km/h) | 60.79 mph (97.83 km/h) |
| 65 mph (104.61 km/h) | 65.86 mph (105.99 km/h) |
| 70 mph (112.65 km/h) | 70.92 mph (114.14 km/h) |
| 75 mph (120.7 km/h) | 75.99 mph (122.29 km/h) |
| 80 mph (128.75 km/h) | 81.05 mph (130.44 km/h) |
| 85 mph (136.79 km/h) | 86.12 mph (138.6 km/h) |
| 90 mph (144.84 km/h) | 91.19 mph (146.75 km/h) |
| 95 mph (152.89 km/h) | 96.25 mph (154.9 km/h) |
| 100 mph (160.93 km/h) | 101.32 mph (163.06 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1785 | 2074 | 2234 | 2332 | 2439 | 2515 | 2598 | 2697 | 2834 | 2970 | 3122 | 3244 | 3464 | 3707 | 3897 | 4019 | 4087 | 4338 | 4687 | 5447 |
Better Fuel Economy Factory Ratios Increased Power
