Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 165/80-15 | 170/65-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.39 (645) | 23.7 (602) | -1.69 (-43) -6.7% |
| Width inches (mm) | 6.5 (165) | 6.69 (170) | 0.2 (5) 3% |
| Circum. inches (mm) | 79.78 (2026.33) | 74.46 (1891.24) | -5.32 (-135.09) -6.7% |
| Sidewall Height inches (mm) | 5.2 (132) | 4.35 (110.5) | -0.85 (-21.5) -16.3% |
| Revolutions per mile (km) | 794.22 (493.5) | 850.95 (528.75) | 56.73 (35.25) 7.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.67 mph (30.04 km/h) |
| 25 mph (40.23 km/h) | 23.33 mph (37.55 km/h) |
| 30 mph (48.28 km/h) | 28 mph (45.06 km/h) |
| 35 mph (56.33 km/h) | 32.67 mph (52.57 km/h) |
| 40 mph (64.37 km/h) | 37.33 mph (60.08 km/h) |
| 45 mph (72.42 km/h) | 42 mph (67.59 km/h) |
| 50 mph (80.47 km/h) | 46.67 mph (75.1 km/h) |
| 55 mph (88.51 km/h) | 51.33 mph (82.61 km/h) |
| 60 mph (96.56 km/h) | 56 mph (90.12 km/h) |
| 65 mph (104.61 km/h) | 60.67 mph (97.63 km/h) |
| 70 mph (112.65 km/h) | 65.33 mph (105.14 km/h) |
| 75 mph (120.7 km/h) | 70 mph (112.65 km/h) |
| 80 mph (128.75 km/h) | 74.67 mph (120.16 km/h) |
| 85 mph (136.79 km/h) | 79.33 mph (127.67 km/h) |
| 90 mph (144.84 km/h) | 84 mph (135.19 km/h) |
| 95 mph (152.89 km/h) | 88.67 mph (142.7 km/h) |
| 100 mph (160.93 km/h) | 93.33 mph (150.21 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2165 | 2516 | 2709 | 2829 | 2958 | 3050 | 3151 | 3271 | 3437 | 3603 | 3787 | 3935 | 4202 | 4497 | 4727 | 4875 | 4958 | 5262 | 5686 | 6607 |
Better Fuel Economy Factory Ratios Increased Power
