Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 165/55-12 | 285/65-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 19.15 (486.3) | 26.59 (675.3) | 7.44 (189) 38.9% |
| Width inches (mm) | 6.5 (165) | 11.22 (285) | 4.72 (120) 72.7% |
| Circum. inches (mm) | 60.15 (1527.76) | 83.52 (2121.52) | 23.38 (593.76) 38.9% |
| Sidewall Height inches (mm) | 3.57 (90.75) | 7.29 (185.25) | 3.72 (94.5) 104.1% |
| Revolutions per mile (km) | 1053.4 (654.55) | 758.58 (471.36) | -294.82 (-183.19) -28% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 27.77 mph (44.7 km/h) |
| 25 mph (40.23 km/h) | 34.72 mph (55.87 km/h) |
| 30 mph (48.28 km/h) | 41.66 mph (67.04 km/h) |
| 35 mph (56.33 km/h) | 48.6 mph (78.22 km/h) |
| 40 mph (64.37 km/h) | 55.55 mph (89.39 km/h) |
| 45 mph (72.42 km/h) | 62.49 mph (100.57 km/h) |
| 50 mph (80.47 km/h) | 69.43 mph (111.74 km/h) |
| 55 mph (88.51 km/h) | 76.38 mph (122.92 km/h) |
| 60 mph (96.56 km/h) | 83.32 mph (134.09 km/h) |
| 65 mph (104.61 km/h) | 90.26 mph (145.26 km/h) |
| 70 mph (112.65 km/h) | 97.21 mph (156.44 km/h) |
| 75 mph (120.7 km/h) | 104.15 mph (167.61 km/h) |
| 80 mph (128.75 km/h) | 111.09 mph (178.79 km/h) |
| 85 mph (136.79 km/h) | 118.04 mph (189.96 km/h) |
| 90 mph (144.84 km/h) | 124.98 mph (201.13 km/h) |
| 95 mph (152.89 km/h) | 131.92 mph (212.31 km/h) |
| 100 mph (160.93 km/h) | 138.86 mph (223.48 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1930 | 2243 | 2415 | 2522 | 2637 | 2719 | 2809 | 2916 | 3064 | 3212 | 3376 | 3508 | 3746 | 4009 | 4214 | 4346 | 4419 | 4691 | 5068 | 5890 |
Better Fuel Economy Factory Ratios Increased Power
