Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/75-15 | 325/85-16 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.47 (748.5) | 37.75 (958.9) | 8.28 (210.4) 28.1% |
| Width inches (mm) | 9.65 (245) | 12.8 (325) | 3.15 (80) 32.7% |
| Circum. inches (mm) | 92.58 (2351.48) | 118.6 (3012.47) | 26.02 (660.99) 28.1% |
| Sidewall Height inches (mm) | 7.23 (183.75) | 10.88 (276.25) | 3.64 (92.5) 50.3% |
| Revolutions per mile (km) | 684.4 (425.26) | 534.23 (331.95) | -150.17 (-93.31) -21.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 25.62 mph (41.23 km/h) |
| 25 mph (40.23 km/h) | 32.03 mph (51.54 km/h) |
| 30 mph (48.28 km/h) | 38.43 mph (61.85 km/h) |
| 35 mph (56.33 km/h) | 44.84 mph (72.16 km/h) |
| 40 mph (64.37 km/h) | 51.24 mph (82.47 km/h) |
| 45 mph (72.42 km/h) | 57.65 mph (92.78 km/h) |
| 50 mph (80.47 km/h) | 64.05 mph (103.09 km/h) |
| 55 mph (88.51 km/h) | 70.46 mph (113.4 km/h) |
| 60 mph (96.56 km/h) | 76.87 mph (123.7 km/h) |
| 65 mph (104.61 km/h) | 83.27 mph (134.01 km/h) |
| 70 mph (112.65 km/h) | 89.68 mph (144.32 km/h) |
| 75 mph (120.7 km/h) | 96.08 mph (154.63 km/h) |
| 80 mph (128.75 km/h) | 102.49 mph (164.94 km/h) |
| 85 mph (136.79 km/h) | 108.89 mph (175.25 km/h) |
| 90 mph (144.84 km/h) | 115.3 mph (185.56 km/h) |
| 95 mph (152.89 km/h) | 121.7 mph (195.86 km/h) |
| 100 mph (160.93 km/h) | 128.11 mph (206.17 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1360 | 1579 | 1701 | 1776 | 1857 | 1915 | 1979 | 2054 | 2158 | 2262 | 2378 | 2470 | 2638 | 2823 | 2968 | 3060 | 3112 | 3303 | 3569 | 4148 |
Better Fuel Economy Factory Ratios Increased Power
