Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/25-21 | 265/30-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.4 (695.9) | 27.26 (692.4) | -0.14 (-3.5) -0.5% |
| Width inches (mm) | 12.8 (325) | 10.43 (265) | -2.36 (-60) -18.5% |
| Circum. inches (mm) | 86.07 (2186.23) | 85.64 (2175.24) | -0.43 (-11) -0.5% |
| 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) | 739.85 (459.72) | 3.72 (2.31) 0.5% |
265/30-21 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.9 mph (32.03 km/h) |
| 25 mph (40.23 km/h) | 24.87 mph (40.03 km/h) |
| 30 mph (48.28 km/h) | 29.85 mph (48.04 km/h) |
| 35 mph (56.33 km/h) | 34.82 mph (56.04 km/h) |
| 40 mph (64.37 km/h) | 39.8 mph (64.05 km/h) |
| 45 mph (72.42 km/h) | 44.77 mph (72.06 km/h) |
| 50 mph (80.47 km/h) | 49.75 mph (80.06 km/h) |
| 55 mph (88.51 km/h) | 54.72 mph (88.07 km/h) |
| 60 mph (96.56 km/h) | 59.7 mph (96.08 km/h) |
| 65 mph (104.61 km/h) | 64.67 mph (104.08 km/h) |
| 70 mph (112.65 km/h) | 69.65 mph (112.09 km/h) |
| 75 mph (120.7 km/h) | 74.62 mph (120.09 km/h) |
| 80 mph (128.75 km/h) | 79.6 mph (128.1 km/h) |
| 85 mph (136.79 km/h) | 84.57 mph (136.11 km/h) |
| 90 mph (144.84 km/h) | 89.55 mph (144.11 km/h) |
| 95 mph (152.89 km/h) | 94.52 mph (152.12 km/h) |
| 100 mph (160.93 km/h) | 99.5 mph (160.13 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1883 | 2187 | 2355 | 2460 | 2572 | 2652 | 2740 | 2844 | 2988 | 3133 | 3293 | 3421 | 3653 | 3910 | 4110 | 4238 | 4310 | 4575 | 4943 | 5744 |
Better Fuel Economy Factory Ratios Increased Power
