Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/40-23 | 325/45-23 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.61 (828.2) | 34.52 (876.7) | 1.91 (48.5) 5.9% |
| Width inches (mm) | 12.01 (305) | 12.8 (325) | 0.79 (20) 6.6% |
| Circum. inches (mm) | 102.44 (2601.87) | 108.43 (2754.23) | 6 (152.37) 5.9% |
| Sidewall Height inches (mm) | 4.8 (122) | 5.76 (146.25) | 0.95 (24.25) 19.9% |
| Revolutions per mile (km) | 618.53 (384.34) | 584.32 (363.08) | -34.22 (-21.26) -5.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.17 mph (34.07 km/h) |
| 25 mph (40.23 km/h) | 26.46 mph (42.59 km/h) |
| 30 mph (48.28 km/h) | 31.76 mph (51.11 km/h) |
| 35 mph (56.33 km/h) | 37.05 mph (59.63 km/h) |
| 40 mph (64.37 km/h) | 42.34 mph (68.14 km/h) |
| 45 mph (72.42 km/h) | 47.64 mph (76.66 km/h) |
| 50 mph (80.47 km/h) | 52.93 mph (85.18 km/h) |
| 55 mph (88.51 km/h) | 58.22 mph (93.7 km/h) |
| 60 mph (96.56 km/h) | 63.51 mph (102.22 km/h) |
| 65 mph (104.61 km/h) | 68.81 mph (110.73 km/h) |
| 70 mph (112.65 km/h) | 74.1 mph (119.25 km/h) |
| 75 mph (120.7 km/h) | 79.39 mph (127.77 km/h) |
| 80 mph (128.75 km/h) | 84.68 mph (136.29 km/h) |
| 85 mph (136.79 km/h) | 89.98 mph (144.81 km/h) |
| 90 mph (144.84 km/h) | 95.27 mph (153.32 km/h) |
| 95 mph (152.89 km/h) | 100.56 mph (161.84 km/h) |
| 100 mph (160.93 km/h) | 105.86 mph (170.36 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1487 | 1727 | 1860 | 1943 | 2031 | 2094 | 2164 | 2246 | 2360 | 2474 | 2601 | 2702 | 2885 | 3088 | 3246 | 3347 | 3404 | 3613 | 3904 | 4537 |
Better Fuel Economy Factory Ratios Increased Power
