Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/25-21 | 325/25-19 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.41 (670.9) | 25.4 (645.1) | -1.02 (-25.8) -3.8% |
| Width inches (mm) | 10.83 (275) | 12.8 (325) | 1.97 (50) 18.2% |
| Circum. inches (mm) | 82.98 (2107.69) | 79.79 (2026.64) | -3.19 (-81.05) -3.8% |
| Sidewall Height inches (mm) | 2.71 (68.75) | 3.2 (81.25) | 0.49 (12.5) 18.2% |
| Revolutions per mile (km) | 763.56 (474.45) | 794.09 (493.43) | 30.54 (18.98) 4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.23 mph (30.95 km/h) |
| 25 mph (40.23 km/h) | 24.04 mph (38.69 km/h) |
| 30 mph (48.28 km/h) | 28.85 mph (46.42 km/h) |
| 35 mph (56.33 km/h) | 33.65 mph (54.16 km/h) |
| 40 mph (64.37 km/h) | 38.46 mph (61.9 km/h) |
| 45 mph (72.42 km/h) | 43.27 mph (69.64 km/h) |
| 50 mph (80.47 km/h) | 48.08 mph (77.37 km/h) |
| 55 mph (88.51 km/h) | 52.88 mph (85.11 km/h) |
| 60 mph (96.56 km/h) | 57.69 mph (92.85 km/h) |
| 65 mph (104.61 km/h) | 62.5 mph (100.58 km/h) |
| 70 mph (112.65 km/h) | 67.31 mph (108.32 km/h) |
| 75 mph (120.7 km/h) | 72.12 mph (116.06 km/h) |
| 80 mph (128.75 km/h) | 76.92 mph (123.8 km/h) |
| 85 mph (136.79 km/h) | 81.73 mph (131.53 km/h) |
| 90 mph (144.84 km/h) | 86.54 mph (139.27 km/h) |
| 95 mph (152.89 km/h) | 91.35 mph (147.01 km/h) |
| 100 mph (160.93 km/h) | 96.15 mph (154.75 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2021 | 2348 | 2528 | 2640 | 2760 | 2846 | 2941 | 3053 | 3208 | 3362 | 3534 | 3672 | 3921 | 4196 | 4411 | 4549 | 4626 | 4910 | 5306 | 6166 |
Better Fuel Economy Factory Ratios Increased Power
