Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/30-20 | 325/35-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.68 (703) | 28.96 (735.5) | 1.28 (32.5) 4.6% |
| Width inches (mm) | 12.8 (325) | 12.8 (325) | 0 (0) 0% |
| Circum. inches (mm) | 86.95 (2208.54) | 90.97 (2310.64) | 4.02 (102.1) 4.6% |
| Sidewall Height inches (mm) | 3.84 (97.5) | 4.48 (113.75) | 0.64 (16.25) 16.7% |
| Revolutions per mile (km) | 728.69 (452.79) | 696.49 (432.78) | -32.2 (-20.01) -4.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.92 mph (33.67 km/h) |
| 25 mph (40.23 km/h) | 26.16 mph (42.09 km/h) |
| 30 mph (48.28 km/h) | 31.39 mph (50.51 km/h) |
| 35 mph (56.33 km/h) | 36.62 mph (58.93 km/h) |
| 40 mph (64.37 km/h) | 41.85 mph (67.35 km/h) |
| 45 mph (72.42 km/h) | 47.08 mph (75.77 km/h) |
| 50 mph (80.47 km/h) | 52.31 mph (84.19 km/h) |
| 55 mph (88.51 km/h) | 57.54 mph (92.61 km/h) |
| 60 mph (96.56 km/h) | 62.77 mph (101.02 km/h) |
| 65 mph (104.61 km/h) | 68 mph (109.44 km/h) |
| 70 mph (112.65 km/h) | 73.24 mph (117.86 km/h) |
| 75 mph (120.7 km/h) | 78.47 mph (126.28 km/h) |
| 80 mph (128.75 km/h) | 83.7 mph (134.7 km/h) |
| 85 mph (136.79 km/h) | 88.93 mph (143.12 km/h) |
| 90 mph (144.84 km/h) | 94.16 mph (151.54 km/h) |
| 95 mph (152.89 km/h) | 99.39 mph (159.96 km/h) |
| 100 mph (160.93 km/h) | 104.62 mph (168.37 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1772 | 2059 | 2217 | 2315 | 2421 | 2497 | 2579 | 2678 | 2813 | 2949 | 3100 | 3221 | 3439 | 3681 | 3869 | 3990 | 4058 | 4307 | 4654 | 5408 |
Better Fuel Economy Factory Ratios Increased Power
