Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 165/80-15 | 165/85-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.39 (645) | 26.04 (661.5) | 0.65 (16.5) 2.6% |
| Width inches (mm) | 6.5 (165) | 6.5 (165) | 0 (0) 0% |
| Circum. inches (mm) | 79.78 (2026.33) | 81.82 (2078.16) | 2.04 (51.84) 2.6% |
| Sidewall Height inches (mm) | 5.2 (132) | 5.52 (140.25) | 0.32 (8.25) 6.3% |
| Revolutions per mile (km) | 794.22 (493.5) | 774.41 (481.19) | -19.81 (-12.31) -2.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.51 mph (33.01 km/h) |
| 25 mph (40.23 km/h) | 25.64 mph (41.26 km/h) |
| 30 mph (48.28 km/h) | 30.77 mph (49.52 km/h) |
| 35 mph (56.33 km/h) | 35.9 mph (57.77 km/h) |
| 40 mph (64.37 km/h) | 41.02 mph (66.02 km/h) |
| 45 mph (72.42 km/h) | 46.15 mph (74.27 km/h) |
| 50 mph (80.47 km/h) | 51.28 mph (82.53 km/h) |
| 55 mph (88.51 km/h) | 56.41 mph (90.78 km/h) |
| 60 mph (96.56 km/h) | 61.53 mph (99.03 km/h) |
| 65 mph (104.61 km/h) | 66.66 mph (107.28 km/h) |
| 70 mph (112.65 km/h) | 71.79 mph (115.54 km/h) |
| 75 mph (120.7 km/h) | 76.92 mph (123.79 km/h) |
| 80 mph (128.75 km/h) | 82.05 mph (132.04 km/h) |
| 85 mph (136.79 km/h) | 87.17 mph (140.29 km/h) |
| 90 mph (144.84 km/h) | 92.3 mph (148.55 km/h) |
| 95 mph (152.89 km/h) | 97.43 mph (156.8 km/h) |
| 100 mph (160.93 km/h) | 102.56 mph (165.05 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1971 | 2289 | 2465 | 2575 | 2692 | 2776 | 2868 | 2977 | 3128 | 3279 | 3447 | 3581 | 3824 | 4092 | 4302 | 4436 | 4512 | 4788 | 5174 | 6013 |
Better Fuel Economy Factory Ratios Increased Power
