Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 165/60-12 | 185/85-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 19.8 (502.8) | 24.38 (619.3) | 4.59 (116.5) 23.2% |
| Width inches (mm) | 6.5 (165) | 7.28 (185) | 0.79 (20) 12.1% |
| Circum. inches (mm) | 62.19 (1579.59) | 76.6 (1945.59) | 14.41 (366) 23.2% |
| Sidewall Height inches (mm) | 3.9 (99) | 6.19 (157.25) | 2.29 (58.25) 58.8% |
| Revolutions per mile (km) | 1018.83 (633.07) | 827.18 (513.98) | -191.66 (-119.09) -18.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 24.63 mph (39.64 km/h) |
| 25 mph (40.23 km/h) | 30.79 mph (49.56 km/h) |
| 30 mph (48.28 km/h) | 36.95 mph (59.47 km/h) |
| 35 mph (56.33 km/h) | 43.11 mph (69.38 km/h) |
| 40 mph (64.37 km/h) | 49.27 mph (79.29 km/h) |
| 45 mph (72.42 km/h) | 55.43 mph (89.2 km/h) |
| 50 mph (80.47 km/h) | 61.59 mph (99.11 km/h) |
| 55 mph (88.51 km/h) | 67.74 mph (109.02 km/h) |
| 60 mph (96.56 km/h) | 73.9 mph (118.93 km/h) |
| 65 mph (104.61 km/h) | 80.06 mph (128.85 km/h) |
| 70 mph (112.65 km/h) | 86.22 mph (138.76 km/h) |
| 75 mph (120.7 km/h) | 92.38 mph (148.67 km/h) |
| 80 mph (128.75 km/h) | 98.54 mph (158.58 km/h) |
| 85 mph (136.79 km/h) | 104.69 mph (168.49 km/h) |
| 90 mph (144.84 km/h) | 110.85 mph (178.4 km/h) |
| 95 mph (152.89 km/h) | 117.01 mph (188.31 km/h) |
| 100 mph (160.93 km/h) | 123.17 mph (198.22 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2105 | 2445 | 2633 | 2750 | 2875 | 2965 | 3063 | 3180 | 3341 | 3502 | 3682 | 3825 | 4085 | 4371 | 4595 | 4739 | 4819 | 5115 | 5527 | 6423 |
Better Fuel Economy Factory Ratios Increased Power
