Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 165/60-12 | 185/60-13 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 19.8 (502.8) | 21.74 (552.2) | 1.94 (49.4) 9.8% |
| Width inches (mm) | 6.5 (165) | 7.28 (185) | 0.79 (20) 12.1% |
| Circum. inches (mm) | 62.19 (1579.59) | 68.3 (1734.79) | 6.11 (155.19) 9.8% |
| Sidewall Height inches (mm) | 3.9 (99) | 4.37 (111) | 0.47 (12) 12.1% |
| Revolutions per mile (km) | 1018.83 (633.07) | 927.69 (576.44) | -91.15 (-56.63) -8.9% |
185/60-13 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.96 mph (35.35 km/h) |
| 25 mph (40.23 km/h) | 27.46 mph (44.19 km/h) |
| 30 mph (48.28 km/h) | 32.95 mph (53.02 km/h) |
| 35 mph (56.33 km/h) | 38.44 mph (61.86 km/h) |
| 40 mph (64.37 km/h) | 43.93 mph (70.7 km/h) |
| 45 mph (72.42 km/h) | 49.42 mph (79.54 km/h) |
| 50 mph (80.47 km/h) | 54.91 mph (88.37 km/h) |
| 55 mph (88.51 km/h) | 60.4 mph (97.21 km/h) |
| 60 mph (96.56 km/h) | 65.89 mph (106.05 km/h) |
| 65 mph (104.61 km/h) | 71.39 mph (114.89 km/h) |
| 70 mph (112.65 km/h) | 76.88 mph (123.72 km/h) |
| 75 mph (120.7 km/h) | 82.37 mph (132.56 km/h) |
| 80 mph (128.75 km/h) | 87.86 mph (141.4 km/h) |
| 85 mph (136.79 km/h) | 93.35 mph (150.23 km/h) |
| 90 mph (144.84 km/h) | 98.84 mph (159.07 km/h) |
| 95 mph (152.89 km/h) | 104.33 mph (167.91 km/h) |
| 100 mph (160.93 km/h) | 109.82 mph (176.75 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
