Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 165/80-15 | 185/80-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.39 (645) | 26.65 (677) | 1.26 (32) 5% |
| Width inches (mm) | 6.5 (165) | 7.28 (185) | 0.79 (20) 12.1% |
| Circum. inches (mm) | 79.78 (2026.33) | 83.73 (2126.86) | 3.96 (100.53) 5% |
| Sidewall Height inches (mm) | 5.2 (132) | 5.83 (148) | 0.63 (16) 12.1% |
| Revolutions per mile (km) | 794.22 (493.5) | 756.68 (470.18) | -37.54 (-23.33) -4.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.99 mph (33.78 km/h) |
| 25 mph (40.23 km/h) | 26.24 mph (42.23 km/h) |
| 30 mph (48.28 km/h) | 31.49 mph (50.68 km/h) |
| 35 mph (56.33 km/h) | 36.74 mph (59.12 km/h) |
| 40 mph (64.37 km/h) | 41.98 mph (67.57 km/h) |
| 45 mph (72.42 km/h) | 47.23 mph (76.01 km/h) |
| 50 mph (80.47 km/h) | 52.48 mph (84.46 km/h) |
| 55 mph (88.51 km/h) | 57.73 mph (92.91 km/h) |
| 60 mph (96.56 km/h) | 62.98 mph (101.35 km/h) |
| 65 mph (104.61 km/h) | 68.22 mph (109.8 km/h) |
| 70 mph (112.65 km/h) | 73.47 mph (118.24 km/h) |
| 75 mph (120.7 km/h) | 78.72 mph (126.69 km/h) |
| 80 mph (128.75 km/h) | 83.97 mph (135.14 km/h) |
| 85 mph (136.79 km/h) | 89.22 mph (143.58 km/h) |
| 90 mph (144.84 km/h) | 94.47 mph (152.03 km/h) |
| 95 mph (152.89 km/h) | 99.71 mph (160.47 km/h) |
| 100 mph (160.93 km/h) | 104.96 mph (168.92 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1926 | 2237 | 2409 | 2516 | 2630 | 2712 | 2802 | 2909 | 3056 | 3204 | 3368 | 3499 | 3736 | 3999 | 4204 | 4335 | 4408 | 4679 | 5056 | 5875 |
Better Fuel Economy Factory Ratios Increased Power
