Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/30-21 | 325/25-22 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.79 (680.4) | 28.4 (721.3) | 1.61 (40.9) 6% |
| Width inches (mm) | 9.65 (245) | 12.8 (325) | 3.15 (80) 32.7% |
| Circum. inches (mm) | 84.16 (2137.54) | 89.21 (2266.03) | 5.06 (128.49) 6% |
| Sidewall Height inches (mm) | 2.89 (73.5) | 3.2 (81.25) | 0.31 (7.75) 10.5% |
| Revolutions per mile (km) | 752.9 (467.83) | 710.2 (441.3) | -42.69 (-26.53) -5.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.2 mph (34.12 km/h) |
| 25 mph (40.23 km/h) | 26.5 mph (42.65 km/h) |
| 30 mph (48.28 km/h) | 31.8 mph (51.18 km/h) |
| 35 mph (56.33 km/h) | 37.1 mph (59.71 km/h) |
| 40 mph (64.37 km/h) | 42.4 mph (68.24 km/h) |
| 45 mph (72.42 km/h) | 47.71 mph (76.77 km/h) |
| 50 mph (80.47 km/h) | 53.01 mph (85.3 km/h) |
| 55 mph (88.51 km/h) | 58.31 mph (93.83 km/h) |
| 60 mph (96.56 km/h) | 63.61 mph (102.37 km/h) |
| 65 mph (104.61 km/h) | 68.91 mph (110.9 km/h) |
| 70 mph (112.65 km/h) | 74.21 mph (119.43 km/h) |
| 75 mph (120.7 km/h) | 79.51 mph (127.96 km/h) |
| 80 mph (128.75 km/h) | 84.81 mph (136.49 km/h) |
| 85 mph (136.79 km/h) | 90.11 mph (145.02 km/h) |
| 90 mph (144.84 km/h) | 95.41 mph (153.55 km/h) |
| 95 mph (152.89 km/h) | 100.71 mph (162.08 km/h) |
| 100 mph (160.93 km/h) | 106.01 mph (170.61 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1807 | 2100 | 2261 | 2361 | 2469 | 2546 | 2630 | 2730 | 2869 | 3007 | 3161 | 3284 | 3507 | 3753 | 3945 | 4068 | 4138 | 4391 | 4745 | 5514 |
Better Fuel Economy Factory Ratios Increased Power
