Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 27/8.5-15 | 170/100-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.08 (687.72) | 25.39 (644.8) | -1.69 (-42.92) -6.2% |
| Width inches (mm) | 8.5 (216) | 6.69 (170) | -1.81 (-46) -21.3% |
| Circum. inches (mm) | 85.06 (2160.54) | 79.75 (2025.7) | -5.31 (-134.84) -6.2% |
| Sidewall Height inches (mm) | 6.04 (153.36) | 6.69 (170) | 0.66 (16.64) 10.9% |
| Revolutions per mile (km) | 744.88 (462.85) | 794.46 (493.66) | 49.58 (30.81) 6.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.75 mph (30.18 km/h) |
| 25 mph (40.23 km/h) | 23.44 mph (37.72 km/h) |
| 30 mph (48.28 km/h) | 28.13 mph (45.27 km/h) |
| 35 mph (56.33 km/h) | 32.82 mph (52.81 km/h) |
| 40 mph (64.37 km/h) | 37.5 mph (60.36 km/h) |
| 45 mph (72.42 km/h) | 42.19 mph (67.9 km/h) |
| 50 mph (80.47 km/h) | 46.88 mph (75.45 km/h) |
| 55 mph (88.51 km/h) | 51.57 mph (82.99 km/h) |
| 60 mph (96.56 km/h) | 56.26 mph (90.53 km/h) |
| 65 mph (104.61 km/h) | 60.94 mph (98.08 km/h) |
| 70 mph (112.65 km/h) | 65.63 mph (105.62 km/h) |
| 75 mph (120.7 km/h) | 70.32 mph (113.17 km/h) |
| 80 mph (128.75 km/h) | 75.01 mph (120.71 km/h) |
| 85 mph (136.79 km/h) | 79.7 mph (128.26 km/h) |
| 90 mph (144.84 km/h) | 84.38 mph (135.8 km/h) |
| 95 mph (152.89 km/h) | 89.07 mph (143.35 km/h) |
| 100 mph (160.93 km/h) | 93.76 mph (150.89 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2022 | 2349 | 2529 | 2641 | 2762 | 2848 | 2942 | 3054 | 3209 | 3364 | 3536 | 3674 | 3923 | 4198 | 4413 | 4551 | 4629 | 4912 | 5308 | 6169 |
Better Fuel Economy Factory Ratios Increased Power
