Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/70-12 | 185/50-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.65 (549.8) | 19.28 (489.8) | -2.36 (-60) -10.9% |
| Width inches (mm) | 6.89 (175) | 7.28 (185) | 0.39 (10) 5.7% |
| Circum. inches (mm) | 68 (1727.25) | 60.58 (1538.75) | -7.42 (-188.5) -10.9% |
| Sidewall Height inches (mm) | 4.82 (122.5) | 3.64 (92.5) | -1.18 (-30) -24.5% |
| Revolutions per mile (km) | 931.74 (578.95) | 1045.88 (649.88) | 114.14 (70.92) 12.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 17.82 mph (28.67 km/h) |
| 25 mph (40.23 km/h) | 22.27 mph (35.84 km/h) |
| 30 mph (48.28 km/h) | 26.73 mph (43.01 km/h) |
| 35 mph (56.33 km/h) | 31.18 mph (50.18 km/h) |
| 40 mph (64.37 km/h) | 35.63 mph (57.35 km/h) |
| 45 mph (72.42 km/h) | 40.09 mph (64.52 km/h) |
| 50 mph (80.47 km/h) | 44.54 mph (71.69 km/h) |
| 55 mph (88.51 km/h) | 49 mph (78.85 km/h) |
| 60 mph (96.56 km/h) | 53.45 mph (86.02 km/h) |
| 65 mph (104.61 km/h) | 57.91 mph (93.19 km/h) |
| 70 mph (112.65 km/h) | 62.36 mph (100.36 km/h) |
| 75 mph (120.7 km/h) | 66.82 mph (107.53 km/h) |
| 80 mph (128.75 km/h) | 71.27 mph (114.7 km/h) |
| 85 mph (136.79 km/h) | 75.72 mph (121.87 km/h) |
| 90 mph (144.84 km/h) | 80.18 mph (129.03 km/h) |
| 95 mph (152.89 km/h) | 84.63 mph (136.2 km/h) |
| 100 mph (160.93 km/h) | 89.09 mph (143.37 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
