Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/80-16 | 31/10-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 36.47 (926.4) | 31 (787.4) | -5.47 (-139) -15% |
| Width inches (mm) | 12.8 (325) | 10 (254) | -2.8 (-71) -21.8% |
| Circum. inches (mm) | 114.58 (2910.37) | 97.39 (2473.69) | -17.19 (-436.68) -15% |
| Sidewall Height inches (mm) | 10.24 (260) | 8 (203.2) | -2.24 (-56.8) -21.8% |
| Revolutions per mile (km) | 552.97 (343.6) | 650.58 (404.25) | 97.62 (60.66) 17.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 17 mph (27.36 km/h) |
| 25 mph (40.23 km/h) | 21.25 mph (34.2 km/h) |
| 30 mph (48.28 km/h) | 25.5 mph (41.04 km/h) |
| 35 mph (56.33 km/h) | 29.75 mph (47.88 km/h) |
| 40 mph (64.37 km/h) | 34 mph (54.72 km/h) |
| 45 mph (72.42 km/h) | 38.25 mph (61.55 km/h) |
| 50 mph (80.47 km/h) | 42.5 mph (68.39 km/h) |
| 55 mph (88.51 km/h) | 46.75 mph (75.23 km/h) |
| 60 mph (96.56 km/h) | 51 mph (82.07 km/h) |
| 65 mph (104.61 km/h) | 55.25 mph (88.91 km/h) |
| 70 mph (112.65 km/h) | 59.5 mph (95.75 km/h) |
| 75 mph (120.7 km/h) | 63.75 mph (102.59 km/h) |
| 80 mph (128.75 km/h) | 68 mph (109.43 km/h) |
| 85 mph (136.79 km/h) | 72.25 mph (116.27 km/h) |
| 90 mph (144.84 km/h) | 76.5 mph (123.11 km/h) |
| 95 mph (152.89 km/h) | 80.75 mph (129.95 km/h) |
| 100 mph (160.93 km/h) | 85 mph (136.79 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1656 | 1923 | 2071 | 2163 | 2261 | 2332 | 2409 | 2501 | 2628 | 2755 | 2896 | 3008 | 3213 | 3438 | 3614 | 3727 | 3790 | 4023 | 4347 | 5051 |
Better Fuel Economy Factory Ratios Increased Power
