Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 215/50-12 | 205/30-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 20.46 (519.8) | 16.84 (427.8) | -3.62 (-92) -17.7% |
| Width inches (mm) | 8.46 (215) | 8.07 (205) | -0.39 (-10) -4.7% |
| Circum. inches (mm) | 64.29 (1633) | 52.91 (1343.97) | -11.38 (-289.03) -17.7% |
| Sidewall Height inches (mm) | 4.23 (107.5) | 2.42 (61.5) | -1.81 (-46) -42.8% |
| Revolutions per mile (km) | 985.51 (612.37) | 1197.45 (744.06) | 211.94 (131.69) 21.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 16.46 mph (26.49 km/h) |
| 25 mph (40.23 km/h) | 20.58 mph (33.11 km/h) |
| 30 mph (48.28 km/h) | 24.69 mph (39.74 km/h) |
| 35 mph (56.33 km/h) | 28.81 mph (46.36 km/h) |
| 40 mph (64.37 km/h) | 32.92 mph (52.98 km/h) |
| 45 mph (72.42 km/h) | 37.04 mph (59.6 km/h) |
| 50 mph (80.47 km/h) | 41.15 mph (66.23 km/h) |
| 55 mph (88.51 km/h) | 45.27 mph (72.85 km/h) |
| 60 mph (96.56 km/h) | 49.38 mph (79.47 km/h) |
| 65 mph (104.61 km/h) | 53.5 mph (86.09 km/h) |
| 70 mph (112.65 km/h) | 57.61 mph (92.72 km/h) |
| 75 mph (120.7 km/h) | 61.73 mph (99.34 km/h) |
| 80 mph (128.75 km/h) | 65.84 mph (105.96 km/h) |
| 85 mph (136.79 km/h) | 69.96 mph (112.58 km/h) |
| 90 mph (144.84 km/h) | 74.07 mph (119.21 km/h) |
| 95 mph (152.89 km/h) | 78.19 mph (125.83 km/h) |
| 100 mph (160.93 km/h) | 82.3 mph (132.45 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
