Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 215/50-12 | 255/50-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 20.46 (519.8) | 22.04 (559.8) | 1.57 (40) 7.7% |
| Width inches (mm) | 8.46 (215) | 10.04 (255) | 1.57 (40) 18.6% |
| Circum. inches (mm) | 64.29 (1633) | 69.24 (1758.66) | 4.95 (125.66) 7.7% |
| Sidewall Height inches (mm) | 4.23 (107.5) | 5.02 (127.5) | 0.79 (20) 18.6% |
| Revolutions per mile (km) | 985.51 (612.37) | 915.09 (568.61) | -70.42 (-43.76) -7.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.54 mph (34.66 km/h) |
| 25 mph (40.23 km/h) | 26.92 mph (43.33 km/h) |
| 30 mph (48.28 km/h) | 32.31 mph (52 km/h) |
| 35 mph (56.33 km/h) | 37.69 mph (60.66 km/h) |
| 40 mph (64.37 km/h) | 43.08 mph (69.33 km/h) |
| 45 mph (72.42 km/h) | 48.46 mph (77.99 km/h) |
| 50 mph (80.47 km/h) | 53.85 mph (86.66 km/h) |
| 55 mph (88.51 km/h) | 59.23 mph (95.33 km/h) |
| 60 mph (96.56 km/h) | 64.62 mph (103.99 km/h) |
| 65 mph (104.61 km/h) | 70 mph (112.66 km/h) |
| 70 mph (112.65 km/h) | 75.39 mph (121.32 km/h) |
| 75 mph (120.7 km/h) | 80.77 mph (129.99 km/h) |
| 80 mph (128.75 km/h) | 86.16 mph (138.66 km/h) |
| 85 mph (136.79 km/h) | 91.54 mph (147.32 km/h) |
| 90 mph (144.84 km/h) | 96.93 mph (155.99 km/h) |
| 95 mph (152.89 km/h) | 102.31 mph (164.65 km/h) |
| 100 mph (160.93 km/h) | 107.7 mph (173.32 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2329 | 2705 | 2913 | 3042 | 3181 | 3280 | 3389 | 3518 | 3696 | 3875 | 4073 | 4231 | 4519 | 4836 | 5084 | 5242 | 5331 | 5658 | 6114 | 7105 |
Better Fuel Economy Factory Ratios Increased Power
