Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/70-17 | 185/65-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.54 (648.8) | 26.47 (672.3) | 0.93 (23.5) 3.6% |
| Width inches (mm) | 6.1 (155) | 7.28 (185) | 1.18 (30) 19.4% |
| Circum. inches (mm) | 80.25 (2038.27) | 83.15 (2112.09) | 2.91 (73.83) 3.6% |
| Sidewall Height inches (mm) | 4.27 (108.5) | 4.73 (120.25) | 0.46 (11.75) 10.8% |
| Revolutions per mile (km) | 789.57 (490.61) | 761.97 (473.46) | -27.6 (-17.15) -3.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.72 mph (33.35 km/h) |
| 25 mph (40.23 km/h) | 25.91 mph (41.69 km/h) |
| 30 mph (48.28 km/h) | 31.09 mph (50.03 km/h) |
| 35 mph (56.33 km/h) | 36.27 mph (58.37 km/h) |
| 40 mph (64.37 km/h) | 41.45 mph (66.71 km/h) |
| 45 mph (72.42 km/h) | 46.63 mph (75.04 km/h) |
| 50 mph (80.47 km/h) | 51.81 mph (83.38 km/h) |
| 55 mph (88.51 km/h) | 56.99 mph (91.72 km/h) |
| 60 mph (96.56 km/h) | 62.17 mph (100.06 km/h) |
| 65 mph (104.61 km/h) | 67.35 mph (108.4 km/h) |
| 70 mph (112.65 km/h) | 72.54 mph (116.73 km/h) |
| 75 mph (120.7 km/h) | 77.72 mph (125.07 km/h) |
| 80 mph (128.75 km/h) | 82.9 mph (133.41 km/h) |
| 85 mph (136.79 km/h) | 88.08 mph (141.75 km/h) |
| 90 mph (144.84 km/h) | 93.26 mph (150.09 km/h) |
| 95 mph (152.89 km/h) | 98.44 mph (158.43 km/h) |
| 100 mph (160.93 km/h) | 103.62 mph (166.76 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1939 | 2253 | 2426 | 2533 | 2649 | 2731 | 2822 | 2929 | 3078 | 3226 | 3391 | 3523 | 3763 | 4027 | 4233 | 4365 | 4439 | 4712 | 5091 | 5916 |
Better Fuel Economy Factory Ratios Increased Power
