Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/80-12 | 185/60-13 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.76 (552.8) | 21.74 (552.2) | -0.02 (-0.6) -0.1% |
| Width inches (mm) | 6.1 (155) | 7.28 (185) | 1.18 (30) 19.4% |
| Circum. inches (mm) | 68.37 (1736.67) | 68.3 (1734.79) | -0.07 (-1.88) -0.1% |
| Sidewall Height inches (mm) | 4.88 (124) | 4.37 (111) | -0.51 (-13) -10.5% |
| Revolutions per mile (km) | 926.68 (575.81) | 927.69 (576.44) | 1.01 (0.63) 0.1% |
185/60-13 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.98 mph (32.15 km/h) |
| 25 mph (40.23 km/h) | 24.97 mph (40.19 km/h) |
| 30 mph (48.28 km/h) | 29.97 mph (48.23 km/h) |
| 35 mph (56.33 km/h) | 34.96 mph (56.27 km/h) |
| 40 mph (64.37 km/h) | 39.96 mph (64.3 km/h) |
| 45 mph (72.42 km/h) | 44.95 mph (72.34 km/h) |
| 50 mph (80.47 km/h) | 49.95 mph (80.38 km/h) |
| 55 mph (88.51 km/h) | 54.94 mph (88.42 km/h) |
| 60 mph (96.56 km/h) | 59.93 mph (96.46 km/h) |
| 65 mph (104.61 km/h) | 64.93 mph (104.49 km/h) |
| 70 mph (112.65 km/h) | 69.92 mph (112.53 km/h) |
| 75 mph (120.7 km/h) | 74.92 mph (120.57 km/h) |
| 80 mph (128.75 km/h) | 79.91 mph (128.61 km/h) |
| 85 mph (136.79 km/h) | 84.91 mph (136.65 km/h) |
| 90 mph (144.84 km/h) | 89.9 mph (144.68 km/h) |
| 95 mph (152.89 km/h) | 94.9 mph (152.72 km/h) |
| 100 mph (160.93 km/h) | 99.89 mph (160.76 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
