Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/55-15 | 185/50-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 22.58 (573.5) | 22.28 (566) | -0.3 (-7.5) -1.3% |
| Width inches (mm) | 6.89 (175) | 7.28 (185) | 0.39 (10) 5.7% |
| Circum. inches (mm) | 70.93 (1801.7) | 70.01 (1778.14) | -0.93 (-23.56) -1.3% |
| Sidewall Height inches (mm) | 3.79 (96.25) | 3.64 (92.5) | -0.15 (-3.75) -3.9% |
| Revolutions per mile (km) | 893.23 (555.03) | 905.07 (562.38) | 11.84 (7.35) 1.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.74 mph (31.77 km/h) |
| 25 mph (40.23 km/h) | 24.67 mph (39.71 km/h) |
| 30 mph (48.28 km/h) | 29.61 mph (47.65 km/h) |
| 35 mph (56.33 km/h) | 34.54 mph (55.59 km/h) |
| 40 mph (64.37 km/h) | 39.48 mph (63.53 km/h) |
| 45 mph (72.42 km/h) | 44.41 mph (71.47 km/h) |
| 50 mph (80.47 km/h) | 49.35 mph (79.42 km/h) |
| 55 mph (88.51 km/h) | 54.28 mph (87.36 km/h) |
| 60 mph (96.56 km/h) | 59.22 mph (95.3 km/h) |
| 65 mph (104.61 km/h) | 64.15 mph (103.24 km/h) |
| 70 mph (112.65 km/h) | 69.08 mph (111.18 km/h) |
| 75 mph (120.7 km/h) | 74.02 mph (119.12 km/h) |
| 80 mph (128.75 km/h) | 78.95 mph (127.06 km/h) |
| 85 mph (136.79 km/h) | 83.89 mph (135.01 km/h) |
| 90 mph (144.84 km/h) | 88.82 mph (142.95 km/h) |
| 95 mph (152.89 km/h) | 93.76 mph (150.89 km/h) |
| 100 mph (160.93 km/h) | 98.69 mph (158.83 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2303 | 2676 | 2881 | 3009 | 3146 | 3244 | 3352 | 3479 | 3656 | 3832 | 4028 | 4185 | 4469 | 4783 | 5028 | 5185 | 5273 | 5596 | 6047 | 7027 |
Better Fuel Economy Factory Ratios Increased Power
