Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 295/25-21 | 305/30-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.81 (680.9) | 27.2 (691) | 0.4 (10.1) 1.5% |
| Width inches (mm) | 11.61 (295) | 12.01 (305) | 0.39 (10) 3.4% |
| Circum. inches (mm) | 84.22 (2139.11) | 85.47 (2170.84) | 1.25 (31.73) 1.5% |
| Sidewall Height inches (mm) | 2.9 (73.75) | 3.6 (91.5) | 0.7 (17.75) 24.1% |
| Revolutions per mile (km) | 752.34 (467.48) | 741.35 (460.65) | -11 (-6.83) -1.5% |
305/30-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.3 mph (32.66 km/h) |
| 25 mph (40.23 km/h) | 25.37 mph (40.83 km/h) |
| 30 mph (48.28 km/h) | 30.44 mph (49 km/h) |
| 35 mph (56.33 km/h) | 35.52 mph (57.16 km/h) |
| 40 mph (64.37 km/h) | 40.59 mph (65.33 km/h) |
| 45 mph (72.42 km/h) | 45.67 mph (73.49 km/h) |
| 50 mph (80.47 km/h) | 50.74 mph (81.66 km/h) |
| 55 mph (88.51 km/h) | 55.82 mph (89.83 km/h) |
| 60 mph (96.56 km/h) | 60.89 mph (97.99 km/h) |
| 65 mph (104.61 km/h) | 65.96 mph (106.16 km/h) |
| 70 mph (112.65 km/h) | 71.04 mph (114.33 km/h) |
| 75 mph (120.7 km/h) | 76.11 mph (122.49 km/h) |
| 80 mph (128.75 km/h) | 81.19 mph (130.66 km/h) |
| 85 mph (136.79 km/h) | 86.26 mph (138.82 km/h) |
| 90 mph (144.84 km/h) | 91.33 mph (146.99 km/h) |
| 95 mph (152.89 km/h) | 96.41 mph (155.16 km/h) |
| 100 mph (160.93 km/h) | 101.48 mph (163.32 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1887 | 2192 | 2360 | 2465 | 2577 | 2657 | 2746 | 2850 | 2994 | 3139 | 3300 | 3428 | 3661 | 3918 | 4118 | 4247 | 4319 | 4584 | 4953 | 5756 |
Better Fuel Economy Factory Ratios Increased Power
