Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/70-16 | 355/30-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 33.91 (861.4) | 28.39 (721) | -5.53 (-140.4) -16.3% |
| Width inches (mm) | 12.8 (325) | 13.98 (355) | 1.18 (30) 9.2% |
| Circum. inches (mm) | 106.54 (2706.17) | 89.18 (2265.09) | -17.37 (-441.08) -16.3% |
| Sidewall Height inches (mm) | 8.96 (227.5) | 4.19 (106.5) | -4.76 (-121) -53.2% |
| Revolutions per mile (km) | 594.69 (369.53) | 710.5 (441.48) | 115.8 (71.96) 19.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 16.74 mph (26.94 km/h) |
| 25 mph (40.23 km/h) | 20.93 mph (33.68 km/h) |
| 30 mph (48.28 km/h) | 25.11 mph (40.41 km/h) |
| 35 mph (56.33 km/h) | 29.3 mph (47.15 km/h) |
| 40 mph (64.37 km/h) | 33.48 mph (53.88 km/h) |
| 45 mph (72.42 km/h) | 37.67 mph (60.62 km/h) |
| 50 mph (80.47 km/h) | 41.85 mph (67.35 km/h) |
| 55 mph (88.51 km/h) | 46.04 mph (74.09 km/h) |
| 60 mph (96.56 km/h) | 50.22 mph (80.82 km/h) |
| 65 mph (104.61 km/h) | 54.41 mph (87.56 km/h) |
| 70 mph (112.65 km/h) | 58.59 mph (94.29 km/h) |
| 75 mph (120.7 km/h) | 62.78 mph (101.03 km/h) |
| 80 mph (128.75 km/h) | 66.96 mph (107.76 km/h) |
| 85 mph (136.79 km/h) | 71.15 mph (114.5 km/h) |
| 90 mph (144.84 km/h) | 75.33 mph (121.23 km/h) |
| 95 mph (152.89 km/h) | 79.52 mph (127.97 km/h) |
| 100 mph (160.93 km/h) | 83.7 mph (134.7 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1808 | 2100 | 2262 | 2362 | 2470 | 2547 | 2631 | 2731 | 2870 | 3008 | 3162 | 3285 | 3508 | 3755 | 3947 | 4070 | 4139 | 4393 | 4747 | 5517 |
Better Fuel Economy Factory Ratios Increased Power
