Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/25-21 | 265/30-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.4 (695.9) | 26.26 (667) | -1.14 (-28.9) -4.2% |
| Width inches (mm) | 12.8 (325) | 10.43 (265) | -2.36 (-60) -18.5% |
| Circum. inches (mm) | 86.07 (2186.23) | 82.5 (2095.44) | -3.57 (-90.79) -4.2% |
| Sidewall Height inches (mm) | 3.2 (81.25) | 3.13 (79.5) | -0.07 (-1.75) -2.2% |
| Revolutions per mile (km) | 736.13 (457.41) | 768.02 (477.23) | 31.9 (19.82) 4.3% |
265/30-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.17 mph (30.85 km/h) |
| 25 mph (40.23 km/h) | 23.96 mph (38.56 km/h) |
| 30 mph (48.28 km/h) | 28.75 mph (46.28 km/h) |
| 35 mph (56.33 km/h) | 33.55 mph (53.99 km/h) |
| 40 mph (64.37 km/h) | 38.34 mph (61.7 km/h) |
| 45 mph (72.42 km/h) | 43.13 mph (69.41 km/h) |
| 50 mph (80.47 km/h) | 47.92 mph (77.13 km/h) |
| 55 mph (88.51 km/h) | 52.72 mph (84.84 km/h) |
| 60 mph (96.56 km/h) | 57.51 mph (92.55 km/h) |
| 65 mph (104.61 km/h) | 62.3 mph (100.26 km/h) |
| 70 mph (112.65 km/h) | 67.09 mph (107.98 km/h) |
| 75 mph (120.7 km/h) | 71.89 mph (115.69 km/h) |
| 80 mph (128.75 km/h) | 76.68 mph (123.4 km/h) |
| 85 mph (136.79 km/h) | 81.47 mph (131.11 km/h) |
| 90 mph (144.84 km/h) | 86.26 mph (138.83 km/h) |
| 95 mph (152.89 km/h) | 91.05 mph (146.54 km/h) |
| 100 mph (160.93 km/h) | 95.85 mph (154.25 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1954 | 2271 | 2445 | 2553 | 2670 | 2753 | 2844 | 2952 | 3102 | 3252 | 3418 | 3551 | 3792 | 4059 | 4267 | 4400 | 4474 | 4749 | 5132 | 5963 |
Better Fuel Economy Factory Ratios Increased Power
