Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/80-15 | 310/85-16 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 35.47 (901) | 36.75 (933.4) | 1.28 (32.4) 3.6% |
| Width inches (mm) | 12.8 (325) | 12.2 (310) | -0.59 (-15) -4.6% |
| Circum. inches (mm) | 111.44 (2830.57) | 115.45 (2932.36) | 4.01 (101.79) 3.6% |
| Sidewall Height inches (mm) | 10.24 (260) | 10.37 (263.5) | 0.14 (3.5) 1.3% |
| Revolutions per mile (km) | 568.56 (353.28) | 548.82 (341.02) | -19.74 (-12.26) -3.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.72 mph (33.34 km/h) |
| 25 mph (40.23 km/h) | 25.9 mph (41.68 km/h) |
| 30 mph (48.28 km/h) | 31.08 mph (50.02 km/h) |
| 35 mph (56.33 km/h) | 36.26 mph (58.35 km/h) |
| 40 mph (64.37 km/h) | 41.44 mph (66.69 km/h) |
| 45 mph (72.42 km/h) | 46.62 mph (75.02 km/h) |
| 50 mph (80.47 km/h) | 51.8 mph (83.36 km/h) |
| 55 mph (88.51 km/h) | 56.98 mph (91.7 km/h) |
| 60 mph (96.56 km/h) | 62.16 mph (100.03 km/h) |
| 65 mph (104.61 km/h) | 67.34 mph (108.37 km/h) |
| 70 mph (112.65 km/h) | 72.52 mph (116.71 km/h) |
| 75 mph (120.7 km/h) | 77.7 mph (125.04 km/h) |
| 80 mph (128.75 km/h) | 82.88 mph (133.38 km/h) |
| 85 mph (136.79 km/h) | 88.06 mph (141.71 km/h) |
| 90 mph (144.84 km/h) | 93.24 mph (150.05 km/h) |
| 95 mph (152.89 km/h) | 98.42 mph (158.39 km/h) |
| 100 mph (160.93 km/h) | 103.6 mph (166.72 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1397 | 1622 | 1747 | 1825 | 1908 | 1967 | 2033 | 2110 | 2217 | 2324 | 2443 | 2538 | 2710 | 2900 | 3049 | 3144 | 3197 | 3394 | 3667 | 4261 |
Better Fuel Economy Factory Ratios Increased Power
