Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 180/60-18 | 195/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.5 (673.2) | 28.75 (730.2) | 2.24 (57) 8.5% |
| Width inches (mm) | 7.09 (180) | 7.68 (195) | 0.59 (15) 8.3% |
| Circum. inches (mm) | 83.26 (2114.92) | 90.31 (2293.99) | 7.05 (179.07) 8.5% |
| Sidewall Height inches (mm) | 4.25 (108) | 5.37 (136.5) | 1.12 (28.5) 26.4% |
| Revolutions per mile (km) | 760.95 (472.83) | 701.55 (435.92) | -59.4 (-36.91) -7.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.69 mph (34.91 km/h) |
| 25 mph (40.23 km/h) | 27.12 mph (43.64 km/h) |
| 30 mph (48.28 km/h) | 32.54 mph (52.37 km/h) |
| 35 mph (56.33 km/h) | 37.96 mph (61.1 km/h) |
| 40 mph (64.37 km/h) | 43.39 mph (69.82 km/h) |
| 45 mph (72.42 km/h) | 48.81 mph (78.55 km/h) |
| 50 mph (80.47 km/h) | 54.23 mph (87.28 km/h) |
| 55 mph (88.51 km/h) | 59.66 mph (96.01 km/h) |
| 60 mph (96.56 km/h) | 65.08 mph (104.74 km/h) |
| 65 mph (104.61 km/h) | 70.5 mph (113.46 km/h) |
| 70 mph (112.65 km/h) | 75.93 mph (122.19 km/h) |
| 75 mph (120.7 km/h) | 81.35 mph (130.92 km/h) |
| 80 mph (128.75 km/h) | 86.77 mph (139.65 km/h) |
| 85 mph (136.79 km/h) | 92.2 mph (148.38 km/h) |
| 90 mph (144.84 km/h) | 97.62 mph (157.1 km/h) |
| 95 mph (152.89 km/h) | 103.04 mph (165.83 km/h) |
| 100 mph (160.93 km/h) | 108.47 mph (174.56 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
