Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 165/80-14 | 185/65-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.39 (619.6) | 24.47 (621.5) | 0.07 (1.9) 0.3% |
| Width inches (mm) | 6.5 (165) | 7.28 (185) | 0.79 (20) 12.1% |
| Circum. inches (mm) | 76.64 (1946.53) | 76.87 (1952.5) | 0.24 (5.97) 0.3% |
| Sidewall Height inches (mm) | 5.2 (132) | 4.73 (120.25) | -0.46 (-11.75) -8.9% |
| Revolutions per mile (km) | 826.78 (513.73) | 824.25 (512.16) | -2.53 (-1.57) -0.3% |
185/65-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.06 mph (32.29 km/h) |
| 25 mph (40.23 km/h) | 25.08 mph (40.36 km/h) |
| 30 mph (48.28 km/h) | 30.09 mph (48.43 km/h) |
| 35 mph (56.33 km/h) | 35.11 mph (56.5 km/h) |
| 40 mph (64.37 km/h) | 40.12 mph (64.57 km/h) |
| 45 mph (72.42 km/h) | 45.14 mph (72.64 km/h) |
| 50 mph (80.47 km/h) | 50.15 mph (80.71 km/h) |
| 55 mph (88.51 km/h) | 55.17 mph (88.79 km/h) |
| 60 mph (96.56 km/h) | 60.18 mph (96.86 km/h) |
| 65 mph (104.61 km/h) | 65.2 mph (104.93 km/h) |
| 70 mph (112.65 km/h) | 70.21 mph (113 km/h) |
| 75 mph (120.7 km/h) | 75.23 mph (121.07 km/h) |
| 80 mph (128.75 km/h) | 80.25 mph (129.14 km/h) |
| 85 mph (136.79 km/h) | 85.26 mph (137.21 km/h) |
| 90 mph (144.84 km/h) | 90.28 mph (145.29 km/h) |
| 95 mph (152.89 km/h) | 95.29 mph (153.36 km/h) |
| 100 mph (160.93 km/h) | 100.31 mph (161.43 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2098 | 2437 | 2624 | 2740 | 2865 | 2954 | 3053 | 3169 | 3329 | 3490 | 3668 | 3811 | 4070 | 4356 | 4579 | 4722 | 4802 | 5097 | 5507 | 6400 |
Better Fuel Economy Factory Ratios Increased Power
