Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 185/80-14 | 27/8.5-14 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.65 (651.6) | 26.93 (683.92) | 1.27 (32.32) 5% |
| Width inches (mm) | 7.28 (185) | 8.5 (216) | 1.22 (31) 16.8% |
| Circum. inches (mm) | 80.59 (2047.06) | 84.59 (2148.6) | 4 (101.54) 5% |
| Sidewall Height inches (mm) | 5.83 (148) | 6.46 (164.16) | 0.64 (16.16) 10.9% |
| Revolutions per mile (km) | 786.17 (488.5) | 749.02 (465.42) | -37.15 (-23.09) -4.7% |
27/8.5-14 Tires
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 (92.9 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 (135.13 km/h) |
| 85 mph (136.79 km/h) | 89.22 mph (143.58 km/h) |
| 90 mph (144.84 km/h) | 94.46 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1906 | 2214 | 2385 | 2490 | 2604 | 2685 | 2774 | 2879 | 3025 | 3171 | 3334 | 3463 | 3699 | 3958 | 4161 | 4291 | 4364 | 4631 | 5005 | 5816 |
Better Fuel Economy Factory Ratios Increased Power
