Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/65-14 | 185/65-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 22.96 (583.1) | 24.47 (621.5) | 1.51 (38.4) 6.6% |
| Width inches (mm) | 6.89 (175) | 7.28 (185) | 0.39 (10) 5.7% |
| Circum. inches (mm) | 72.12 (1831.86) | 76.87 (1952.5) | 4.75 (120.64) 6.6% |
| Sidewall Height inches (mm) | 4.48 (113.75) | 4.73 (120.25) | 0.26 (6.5) 5.7% |
| Revolutions per mile (km) | 878.53 (545.89) | 824.25 (512.16) | -54.28 (-33.73) -6.2% |
185/65-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.32 mph (34.31 km/h) |
| 25 mph (40.23 km/h) | 26.65 mph (42.88 km/h) |
| 30 mph (48.28 km/h) | 31.98 mph (51.46 km/h) |
| 35 mph (56.33 km/h) | 37.3 mph (60.04 km/h) |
| 40 mph (64.37 km/h) | 42.63 mph (68.61 km/h) |
| 45 mph (72.42 km/h) | 47.96 mph (77.19 km/h) |
| 50 mph (80.47 km/h) | 53.29 mph (85.77 km/h) |
| 55 mph (88.51 km/h) | 58.62 mph (94.34 km/h) |
| 60 mph (96.56 km/h) | 63.95 mph (102.92 km/h) |
| 65 mph (104.61 km/h) | 69.28 mph (111.5 km/h) |
| 70 mph (112.65 km/h) | 74.61 mph (120.07 km/h) |
| 75 mph (120.7 km/h) | 79.94 mph (128.65 km/h) |
| 80 mph (128.75 km/h) | 85.27 mph (137.23 km/h) |
| 85 mph (136.79 km/h) | 90.6 mph (145.8 km/h) |
| 90 mph (144.84 km/h) | 95.93 mph (154.38 km/h) |
| 95 mph (152.89 km/h) | 101.26 mph (162.96 km/h) |
| 100 mph (160.93 km/h) | 106.59 mph (171.53 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
