Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 355/25-21 | 305/30-19 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.99 (710.9) | 26.2 (665.6) | -1.78 (-45.3) -6.4% |
| Width inches (mm) | 13.98 (355) | 12.01 (305) | -1.97 (-50) -14.1% |
| Circum. inches (mm) | 87.93 (2233.36) | 82.32 (2091.04) | -5.6 (-142.31) -6.4% |
| Sidewall Height inches (mm) | 3.49 (88.75) | 3.6 (91.5) | 0.11 (2.75) 3.1% |
| Revolutions per mile (km) | 720.59 (447.76) | 769.64 (478.23) | 49.04 (30.47) 6.8% |
305/30-19 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.73 mph (30.14 km/h) |
| 25 mph (40.23 km/h) | 23.41 mph (37.67 km/h) |
| 30 mph (48.28 km/h) | 28.09 mph (45.2 km/h) |
| 35 mph (56.33 km/h) | 32.77 mph (52.74 km/h) |
| 40 mph (64.37 km/h) | 37.45 mph (60.27 km/h) |
| 45 mph (72.42 km/h) | 42.13 mph (67.81 km/h) |
| 50 mph (80.47 km/h) | 46.81 mph (75.34 km/h) |
| 55 mph (88.51 km/h) | 51.5 mph (82.87 km/h) |
| 60 mph (96.56 km/h) | 56.18 mph (90.41 km/h) |
| 65 mph (104.61 km/h) | 60.86 mph (97.94 km/h) |
| 70 mph (112.65 km/h) | 65.54 mph (105.48 km/h) |
| 75 mph (120.7 km/h) | 70.22 mph (113.01 km/h) |
| 80 mph (128.75 km/h) | 74.9 mph (120.54 km/h) |
| 85 mph (136.79 km/h) | 79.58 mph (128.08 km/h) |
| 90 mph (144.84 km/h) | 84.27 mph (135.61 km/h) |
| 95 mph (152.89 km/h) | 88.95 mph (143.15 km/h) |
| 100 mph (160.93 km/h) | 93.63 mph (150.68 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1959 | 2275 | 2450 | 2559 | 2675 | 2759 | 2850 | 2959 | 3109 | 3259 | 3425 | 3559 | 3800 | 4067 | 4276 | 4409 | 4484 | 4759 | 5142 | 5976 |
Better Fuel Economy Factory Ratios Increased Power
