Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 120/60-12 | 120/30-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 17.67 (448.8) | 14.83 (376.8) | -2.83 (-72) -16% |
| Width inches (mm) | 4.72 (120) | 4.72 (120) | 0 (0) 0% |
| Circum. inches (mm) | 55.51 (1409.95) | 46.6 (1183.75) | -8.91 (-226.19) -16% |
| Sidewall Height inches (mm) | 2.83 (72) | 1.42 (36) | -1.42 (-36) -50% |
| Revolutions per mile (km) | 1141.42 (709.25) | 1359.53 (844.77) | 218.11 (135.52) 19.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 16.79 mph (27.02 km/h) |
| 25 mph (40.23 km/h) | 20.99 mph (33.78 km/h) |
| 30 mph (48.28 km/h) | 25.19 mph (40.53 km/h) |
| 35 mph (56.33 km/h) | 29.39 mph (47.29 km/h) |
| 40 mph (64.37 km/h) | 33.58 mph (54.05 km/h) |
| 45 mph (72.42 km/h) | 37.78 mph (60.8 km/h) |
| 50 mph (80.47 km/h) | 41.98 mph (67.56 km/h) |
| 55 mph (88.51 km/h) | 46.18 mph (74.31 km/h) |
| 60 mph (96.56 km/h) | 50.37 mph (81.07 km/h) |
| 65 mph (104.61 km/h) | 54.57 mph (87.83 km/h) |
| 70 mph (112.65 km/h) | 58.77 mph (94.58 km/h) |
| 75 mph (120.7 km/h) | 62.97 mph (101.34 km/h) |
| 80 mph (128.75 km/h) | 67.17 mph (108.09 km/h) |
| 85 mph (136.79 km/h) | 71.36 mph (114.85 km/h) |
| 90 mph (144.84 km/h) | 75.56 mph (121.6 km/h) |
| 95 mph (152.89 km/h) | 79.76 mph (128.36 km/h) |
| 100 mph (160.93 km/h) | 83.96 mph (135.12 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
