Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/25-21 | 305/50-22 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.4 (695.9) | 34.01 (863.8) | 6.61 (167.9) 24.1% |
| Width inches (mm) | 12.8 (325) | 12.01 (305) | -0.79 (-20) -6.2% |
| Circum. inches (mm) | 86.07 (2186.23) | 106.84 (2713.71) | 20.77 (527.47) 24.1% |
| Sidewall Height inches (mm) | 3.2 (81.25) | 6 (152.5) | 2.81 (71.25) 87.7% |
| Revolutions per mile (km) | 736.13 (457.41) | 593.04 (368.5) | -143.08 (-88.91) -19.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 24.83 mph (39.95 km/h) |
| 25 mph (40.23 km/h) | 31.03 mph (49.94 km/h) |
| 30 mph (48.28 km/h) | 37.24 mph (59.93 km/h) |
| 35 mph (56.33 km/h) | 43.44 mph (69.92 km/h) |
| 40 mph (64.37 km/h) | 49.65 mph (79.91 km/h) |
| 45 mph (72.42 km/h) | 55.86 mph (89.89 km/h) |
| 50 mph (80.47 km/h) | 62.06 mph (99.88 km/h) |
| 55 mph (88.51 km/h) | 68.27 mph (109.87 km/h) |
| 60 mph (96.56 km/h) | 74.48 mph (119.86 km/h) |
| 65 mph (104.61 km/h) | 80.68 mph (129.85 km/h) |
| 70 mph (112.65 km/h) | 86.89 mph (139.83 km/h) |
| 75 mph (120.7 km/h) | 93.1 mph (149.82 km/h) |
| 80 mph (128.75 km/h) | 99.3 mph (159.81 km/h) |
| 85 mph (136.79 km/h) | 105.51 mph (169.8 km/h) |
| 90 mph (144.84 km/h) | 111.71 mph (179.79 km/h) |
| 95 mph (152.89 km/h) | 117.92 mph (189.78 km/h) |
| 100 mph (160.93 km/h) | 124.13 mph (199.76 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1509 | 1753 | 1888 | 1972 | 2061 | 2126 | 2196 | 2280 | 2395 | 2511 | 2639 | 2742 | 2928 | 3134 | 3295 | 3397 | 3455 | 3667 | 3962 | 4605 |
Better Fuel Economy Factory Ratios Increased Power
