Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/70-17 | 185/55-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.54 (648.8) | 25.01 (635.3) | -0.53 (-13.5) -2.1% |
| Width inches (mm) | 6.1 (155) | 7.28 (185) | 1.18 (30) 19.4% |
| Circum. inches (mm) | 80.25 (2038.27) | 78.58 (1995.85) | -1.67 (-42.41) -2.1% |
| Sidewall Height inches (mm) | 4.27 (108.5) | 4.01 (101.75) | -0.27 (-6.75) -6.2% |
| Revolutions per mile (km) | 789.57 (490.61) | 806.34 (501.04) | 16.78 (10.43) 2.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.58 mph (31.52 km/h) |
| 25 mph (40.23 km/h) | 24.48 mph (39.4 km/h) |
| 30 mph (48.28 km/h) | 29.38 mph (47.28 km/h) |
| 35 mph (56.33 km/h) | 34.27 mph (55.16 km/h) |
| 40 mph (64.37 km/h) | 39.17 mph (63.03 km/h) |
| 45 mph (72.42 km/h) | 44.06 mph (70.91 km/h) |
| 50 mph (80.47 km/h) | 48.96 mph (78.79 km/h) |
| 55 mph (88.51 km/h) | 53.86 mph (86.67 km/h) |
| 60 mph (96.56 km/h) | 58.75 mph (94.55 km/h) |
| 65 mph (104.61 km/h) | 63.65 mph (102.43 km/h) |
| 70 mph (112.65 km/h) | 68.54 mph (110.31 km/h) |
| 75 mph (120.7 km/h) | 73.44 mph (118.19 km/h) |
| 80 mph (128.75 km/h) | 78.34 mph (126.07 km/h) |
| 85 mph (136.79 km/h) | 83.23 mph (133.95 km/h) |
| 90 mph (144.84 km/h) | 88.13 mph (141.83 km/h) |
| 95 mph (152.89 km/h) | 93.02 mph (149.71 km/h) |
| 100 mph (160.93 km/h) | 97.92 mph (157.59 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2052 | 2384 | 2567 | 2681 | 2803 | 2890 | 2986 | 3100 | 3257 | 3414 | 3589 | 3729 | 3982 | 4261 | 4479 | 4619 | 4698 | 4986 | 5388 | 6261 |
Better Fuel Economy Factory Ratios Increased Power
