Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 38/13.5-20 | 325/60-16 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 38.1 (967.62) | 31.35 (796.4) | -6.74 (-171.22) -17.7% |
| Width inches (mm) | 13.5 (343) | 12.8 (325) | -0.71 (-18) -5.2% |
| Circum. inches (mm) | 119.68 (3039.87) | 98.5 (2501.96) | -21.18 (-537.9) -17.7% |
| Sidewall Height inches (mm) | 9.05 (229.81) | 7.68 (195) | -1.37 (-34.81) -15.1% |
| Revolutions per mile (km) | 529.41 (328.96) | 643.23 (399.69) | 113.82 (70.72) 21.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 16.46 mph (26.49 km/h) |
| 25 mph (40.23 km/h) | 20.58 mph (33.11 km/h) |
| 30 mph (48.28 km/h) | 24.69 mph (39.74 km/h) |
| 35 mph (56.33 km/h) | 28.81 mph (46.36 km/h) |
| 40 mph (64.37 km/h) | 32.92 mph (52.98 km/h) |
| 45 mph (72.42 km/h) | 37.04 mph (59.61 km/h) |
| 50 mph (80.47 km/h) | 41.15 mph (66.23 km/h) |
| 55 mph (88.51 km/h) | 45.27 mph (72.85 km/h) |
| 60 mph (96.56 km/h) | 49.38 mph (79.47 km/h) |
| 65 mph (104.61 km/h) | 53.5 mph (86.1 km/h) |
| 70 mph (112.65 km/h) | 57.61 mph (92.72 km/h) |
| 75 mph (120.7 km/h) | 61.73 mph (99.34 km/h) |
| 80 mph (128.75 km/h) | 65.84 mph (105.97 km/h) |
| 85 mph (136.79 km/h) | 69.96 mph (112.59 km/h) |
| 90 mph (144.84 km/h) | 74.07 mph (119.21 km/h) |
| 95 mph (152.89 km/h) | 78.19 mph (125.83 km/h) |
| 100 mph (160.93 km/h) | 82.31 mph (132.46 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1637 | 1902 | 2048 | 2138 | 2236 | 2306 | 2382 | 2473 | 2598 | 2724 | 2863 | 2974 | 3176 | 3399 | 3573 | 3685 | 3747 | 3977 | 4298 | 4994 |
Better Fuel Economy Factory Ratios Increased Power
