Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/30-21 | 255/25-22 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.79 (680.4) | 27.02 (686.3) | 0.23 (5.9) 0.9% |
| Width inches (mm) | 9.65 (245) | 10.04 (255) | 0.39 (10) 4.1% |
| Circum. inches (mm) | 84.16 (2137.54) | 84.88 (2156.08) | 0.73 (18.54) 0.9% |
| Sidewall Height inches (mm) | 2.89 (73.5) | 2.51 (63.75) | -0.38 (-9.75) -13.3% |
| Revolutions per mile (km) | 752.9 (467.83) | 746.42 (463.8) | -6.47 (-4.02) -0.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.17 mph (32.47 km/h) |
| 25 mph (40.23 km/h) | 25.22 mph (40.58 km/h) |
| 30 mph (48.28 km/h) | 30.26 mph (48.7 km/h) |
| 35 mph (56.33 km/h) | 35.3 mph (56.82 km/h) |
| 40 mph (64.37 km/h) | 40.35 mph (64.93 km/h) |
| 45 mph (72.42 km/h) | 45.39 mph (73.05 km/h) |
| 50 mph (80.47 km/h) | 50.43 mph (81.17 km/h) |
| 55 mph (88.51 km/h) | 55.48 mph (89.28 km/h) |
| 60 mph (96.56 km/h) | 60.52 mph (97.4 km/h) |
| 65 mph (104.61 km/h) | 65.56 mph (105.51 km/h) |
| 70 mph (112.65 km/h) | 70.61 mph (113.63 km/h) |
| 75 mph (120.7 km/h) | 75.65 mph (121.75 km/h) |
| 80 mph (128.75 km/h) | 80.69 mph (129.86 km/h) |
| 85 mph (136.79 km/h) | 85.74 mph (137.98 km/h) |
| 90 mph (144.84 km/h) | 90.78 mph (146.1 km/h) |
| 95 mph (152.89 km/h) | 95.82 mph (154.21 km/h) |
| 100 mph (160.93 km/h) | 100.87 mph (162.33 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1900 | 2207 | 2376 | 2481 | 2595 | 2675 | 2764 | 2869 | 3015 | 3160 | 3322 | 3451 | 3686 | 3945 | 4147 | 4276 | 4349 | 4615 | 4987 | 5796 |
Better Fuel Economy Factory Ratios Increased Power
