Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 345/25-20 | 305/25-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.79 (680.5) | 26 (660.5) | -0.79 (-20) -2.9% |
| Width inches (mm) | 13.58 (345) | 12.01 (305) | -1.57 (-40) -11.6% |
| Circum. inches (mm) | 84.17 (2137.85) | 81.69 (2075.02) | -2.47 (-62.83) -2.9% |
| Sidewall Height inches (mm) | 3.4 (86.25) | 3 (76.25) | -0.39 (-10) -11.6% |
| Revolutions per mile (km) | 752.78 (467.76) | 775.58 (481.92) | 22.79 (14.16) 3% |
305/25-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.41 mph (31.24 km/h) |
| 25 mph (40.23 km/h) | 24.27 mph (39.05 km/h) |
| 30 mph (48.28 km/h) | 29.12 mph (46.86 km/h) |
| 35 mph (56.33 km/h) | 33.97 mph (54.67 km/h) |
| 40 mph (64.37 km/h) | 38.82 mph (62.48 km/h) |
| 45 mph (72.42 km/h) | 43.68 mph (70.29 km/h) |
| 50 mph (80.47 km/h) | 48.53 mph (78.1 km/h) |
| 55 mph (88.51 km/h) | 53.38 mph (85.91 km/h) |
| 60 mph (96.56 km/h) | 58.24 mph (93.72 km/h) |
| 65 mph (104.61 km/h) | 63.09 mph (101.53 km/h) |
| 70 mph (112.65 km/h) | 67.94 mph (109.34 km/h) |
| 75 mph (120.7 km/h) | 72.8 mph (117.15 km/h) |
| 80 mph (128.75 km/h) | 77.65 mph (124.96 km/h) |
| 85 mph (136.79 km/h) | 82.5 mph (132.77 km/h) |
| 90 mph (144.84 km/h) | 87.35 mph (140.58 km/h) |
| 95 mph (152.89 km/h) | 92.21 mph (148.39 km/h) |
| 100 mph (160.93 km/h) | 97.06 mph (156.2 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1974 | 2293 | 2469 | 2578 | 2696 | 2780 | 2872 | 2982 | 3133 | 3284 | 3452 | 3586 | 3830 | 4099 | 4309 | 4443 | 4519 | 4796 | 5182 | 6022 |
Better Fuel Economy Factory Ratios Increased Power
