Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 335/25-20 | 305/30-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.59 (675.5) | 27.2 (691) | 0.61 (15.5) 2.3% |
| Width inches (mm) | 13.19 (335) | 12.01 (305) | -1.18 (-30) -9% |
| Circum. inches (mm) | 83.55 (2122.15) | 85.47 (2170.84) | 1.92 (48.69) 2.3% |
| Sidewall Height inches (mm) | 3.3 (83.75) | 3.6 (91.5) | 0.31 (7.75) 9.3% |
| Revolutions per mile (km) | 758.36 (471.22) | 741.35 (460.65) | -17.01 (-10.57) -2.2% |
305/30-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.46 mph (32.93 km/h) |
| 25 mph (40.23 km/h) | 25.57 mph (41.16 km/h) |
| 30 mph (48.28 km/h) | 30.69 mph (49.39 km/h) |
| 35 mph (56.33 km/h) | 35.8 mph (57.62 km/h) |
| 40 mph (64.37 km/h) | 40.92 mph (65.85 km/h) |
| 45 mph (72.42 km/h) | 46.03 mph (74.08 km/h) |
| 50 mph (80.47 km/h) | 51.15 mph (82.31 km/h) |
| 55 mph (88.51 km/h) | 56.26 mph (90.55 km/h) |
| 60 mph (96.56 km/h) | 61.38 mph (98.78 km/h) |
| 65 mph (104.61 km/h) | 66.49 mph (107.01 km/h) |
| 70 mph (112.65 km/h) | 71.61 mph (115.24 km/h) |
| 75 mph (120.7 km/h) | 76.72 mph (123.47 km/h) |
| 80 mph (128.75 km/h) | 81.84 mph (131.7 km/h) |
| 85 mph (136.79 km/h) | 86.95 mph (139.93 km/h) |
| 90 mph (144.84 km/h) | 92.07 mph (148.16 km/h) |
| 95 mph (152.89 km/h) | 97.18 mph (156.4 km/h) |
| 100 mph (160.93 km/h) | 102.29 mph (164.63 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
