Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/25-21 | 305/40-26 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.4 (695.9) | 35.61 (904.4) | 8.21 (208.5) 30% |
| Width inches (mm) | 12.8 (325) | 12.01 (305) | -0.79 (-20) -6.2% |
| Circum. inches (mm) | 86.07 (2186.23) | 111.86 (2841.26) | 25.79 (655.02) 30% |
| Sidewall Height inches (mm) | 3.2 (81.25) | 4.8 (122) | 1.6 (40.75) 50.2% |
| Revolutions per mile (km) | 736.13 (457.41) | 566.42 (351.96) | -169.71 (-105.45) -23.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 25.99 mph (41.83 km/h) |
| 25 mph (40.23 km/h) | 32.49 mph (52.29 km/h) |
| 30 mph (48.28 km/h) | 38.99 mph (62.75 km/h) |
| 35 mph (56.33 km/h) | 45.49 mph (73.2 km/h) |
| 40 mph (64.37 km/h) | 51.98 mph (83.66 km/h) |
| 45 mph (72.42 km/h) | 58.48 mph (94.12 km/h) |
| 50 mph (80.47 km/h) | 64.98 mph (104.58 km/h) |
| 55 mph (88.51 km/h) | 71.48 mph (115.03 km/h) |
| 60 mph (96.56 km/h) | 77.98 mph (125.49 km/h) |
| 65 mph (104.61 km/h) | 84.47 mph (135.95 km/h) |
| 70 mph (112.65 km/h) | 90.97 mph (146.41 km/h) |
| 75 mph (120.7 km/h) | 97.47 mph (156.86 km/h) |
| 80 mph (128.75 km/h) | 103.97 mph (167.32 km/h) |
| 85 mph (136.79 km/h) | 110.47 mph (177.78 km/h) |
| 90 mph (144.84 km/h) | 116.97 mph (188.24 km/h) |
| 95 mph (152.89 km/h) | 123.46 mph (198.7 km/h) |
| 100 mph (160.93 km/h) | 129.96 mph (209.15 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1441 | 1675 | 1803 | 1883 | 1969 | 2030 | 2098 | 2177 | 2288 | 2398 | 2521 | 2619 | 2797 | 2993 | 3147 | 3245 | 3300 | 3502 | 3785 | 4398 |
Better Fuel Economy Factory Ratios Increased Power
