Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/55-15 | 185/50-14 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.71 (551.5) | 21.28 (540.6) | -0.43 (-10.9) -2% |
| Width inches (mm) | 6.1 (155) | 7.28 (185) | 1.18 (30) 19.4% |
| Circum. inches (mm) | 68.21 (1732.59) | 66.86 (1698.34) | -1.35 (-34.24) -2% |
| Sidewall Height inches (mm) | 3.36 (85.25) | 3.64 (92.5) | 0.29 (7.25) 8.5% |
| Revolutions per mile (km) | 928.87 (577.17) | 947.6 (588.81) | 18.73 (11.64) 2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.6 mph (31.55 km/h) |
| 25 mph (40.23 km/h) | 24.51 mph (39.44 km/h) |
| 30 mph (48.28 km/h) | 29.41 mph (47.33 km/h) |
| 35 mph (56.33 km/h) | 34.31 mph (55.21 km/h) |
| 40 mph (64.37 km/h) | 39.21 mph (63.1 km/h) |
| 45 mph (72.42 km/h) | 44.11 mph (70.99 km/h) |
| 50 mph (80.47 km/h) | 49.01 mph (78.88 km/h) |
| 55 mph (88.51 km/h) | 53.91 mph (86.76 km/h) |
| 60 mph (96.56 km/h) | 58.81 mph (94.65 km/h) |
| 65 mph (104.61 km/h) | 63.72 mph (102.54 km/h) |
| 70 mph (112.65 km/h) | 68.62 mph (110.43 km/h) |
| 75 mph (120.7 km/h) | 73.52 mph (118.32 km/h) |
| 80 mph (128.75 km/h) | 78.42 mph (126.2 km/h) |
| 85 mph (136.79 km/h) | 83.32 mph (134.09 km/h) |
| 90 mph (144.84 km/h) | 88.22 mph (141.98 km/h) |
| 95 mph (152.89 km/h) | 93.12 mph (149.87 km/h) |
| 100 mph (160.93 km/h) | 98.02 mph (157.75 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
