Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/80-13 | 185/50-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.02 (610.2) | 22.28 (566) | -1.74 (-44.2) -7.2% |
| Width inches (mm) | 6.89 (175) | 7.28 (185) | 0.39 (10) 5.7% |
| Circum. inches (mm) | 75.47 (1917) | 70.01 (1778.14) | -5.47 (-138.86) -7.2% |
| Sidewall Height inches (mm) | 5.51 (140) | 3.64 (92.5) | -1.87 (-47.5) -33.9% |
| Revolutions per mile (km) | 839.51 (521.65) | 905.07 (562.38) | 65.56 (40.74) 7.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.55 mph (29.86 km/h) |
| 25 mph (40.23 km/h) | 23.19 mph (37.32 km/h) |
| 30 mph (48.28 km/h) | 27.83 mph (44.78 km/h) |
| 35 mph (56.33 km/h) | 32.46 mph (52.25 km/h) |
| 40 mph (64.37 km/h) | 37.1 mph (59.71 km/h) |
| 45 mph (72.42 km/h) | 41.74 mph (67.17 km/h) |
| 50 mph (80.47 km/h) | 46.38 mph (74.64 km/h) |
| 55 mph (88.51 km/h) | 51.02 mph (82.1 km/h) |
| 60 mph (96.56 km/h) | 55.65 mph (89.57 km/h) |
| 65 mph (104.61 km/h) | 60.29 mph (97.03 km/h) |
| 70 mph (112.65 km/h) | 64.93 mph (104.49 km/h) |
| 75 mph (120.7 km/h) | 69.57 mph (111.96 km/h) |
| 80 mph (128.75 km/h) | 74.21 mph (119.42 km/h) |
| 85 mph (136.79 km/h) | 78.84 mph (126.89 km/h) |
| 90 mph (144.84 km/h) | 83.48 mph (134.35 km/h) |
| 95 mph (152.89 km/h) | 88.12 mph (141.81 km/h) |
| 100 mph (160.93 km/h) | 92.76 mph (149.28 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
