Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 180/60-15 | 145/80-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 23.5 (597) | 21.13 (536.8) | -2.37 (-60.2) -10.1% |
| Width inches (mm) | 7.09 (180) | 5.71 (145) | -1.38 (-35) -19.4% |
| Circum. inches (mm) | 73.84 (1875.53) | 66.39 (1686.41) | -7.45 (-189.12) -10.1% |
| Sidewall Height inches (mm) | 4.25 (108) | 4.57 (116) | 0.31 (8) 7.4% |
| Revolutions per mile (km) | 858.07 (533.18) | 954.3 (592.98) | 96.23 (59.79) 11.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 17.98 mph (28.94 km/h) |
| 25 mph (40.23 km/h) | 22.48 mph (36.18 km/h) |
| 30 mph (48.28 km/h) | 26.97 mph (43.41 km/h) |
| 35 mph (56.33 km/h) | 31.47 mph (50.65 km/h) |
| 40 mph (64.37 km/h) | 35.97 mph (57.88 km/h) |
| 45 mph (72.42 km/h) | 40.46 mph (65.12 km/h) |
| 50 mph (80.47 km/h) | 44.96 mph (72.35 km/h) |
| 55 mph (88.51 km/h) | 49.45 mph (79.59 km/h) |
| 60 mph (96.56 km/h) | 53.95 mph (86.82 km/h) |
| 65 mph (104.61 km/h) | 58.45 mph (94.06 km/h) |
| 70 mph (112.65 km/h) | 62.94 mph (101.29 km/h) |
| 75 mph (120.7 km/h) | 67.44 mph (108.53 km/h) |
| 80 mph (128.75 km/h) | 71.93 mph (115.77 km/h) |
| 85 mph (136.79 km/h) | 76.43 mph (123 km/h) |
| 90 mph (144.84 km/h) | 80.92 mph (130.24 km/h) |
| 95 mph (152.89 km/h) | 85.42 mph (137.47 km/h) |
| 100 mph (160.93 km/h) | 89.92 mph (144.71 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Better Fuel Economy Factory Ratios Increased Power
