Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/40-23 | 325/30-23 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.61 (828.2) | 30.68 (779.2) | -1.93 (-49) -5.9% |
| Width inches (mm) | 12.01 (305) | 12.8 (325) | 0.79 (20) 6.6% |
| Circum. inches (mm) | 102.44 (2601.87) | 96.38 (2447.93) | -6.06 (-153.94) -5.9% |
| Sidewall Height inches (mm) | 4.8 (122) | 3.84 (97.5) | -0.96 (-24.5) -20.1% |
| Revolutions per mile (km) | 618.53 (384.34) | 657.43 (408.51) | 38.9 (24.17) 6.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.82 mph (30.28 km/h) |
| 25 mph (40.23 km/h) | 23.52 mph (37.85 km/h) |
| 30 mph (48.28 km/h) | 28.23 mph (45.42 km/h) |
| 35 mph (56.33 km/h) | 32.93 mph (52.99 km/h) |
| 40 mph (64.37 km/h) | 37.63 mph (60.57 km/h) |
| 45 mph (72.42 km/h) | 42.34 mph (68.14 km/h) |
| 50 mph (80.47 km/h) | 47.04 mph (75.71 km/h) |
| 55 mph (88.51 km/h) | 51.75 mph (83.28 km/h) |
| 60 mph (96.56 km/h) | 56.45 mph (90.85 km/h) |
| 65 mph (104.61 km/h) | 61.15 mph (98.42 km/h) |
| 70 mph (112.65 km/h) | 65.86 mph (105.99 km/h) |
| 75 mph (120.7 km/h) | 70.56 mph (113.56 km/h) |
| 80 mph (128.75 km/h) | 75.27 mph (121.13 km/h) |
| 85 mph (136.79 km/h) | 79.97 mph (128.7 km/h) |
| 90 mph (144.84 km/h) | 84.68 mph (136.27 km/h) |
| 95 mph (152.89 km/h) | 89.38 mph (143.84 km/h) |
| 100 mph (160.93 km/h) | 94.08 mph (151.41 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1673 | 1944 | 2093 | 2186 | 2285 | 2356 | 2435 | 2527 | 2655 | 2784 | 2926 | 3040 | 3246 | 3474 | 3652 | 3766 | 3830 | 4065 | 4393 | 5105 |
Better Fuel Economy Factory Ratios Increased Power
