Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/40-23 | 320/85-24 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.61 (828.2) | 45.42 (1153.6) | 12.81 (325.4) 39.3% |
| Width inches (mm) | 12.01 (305) | 12.6 (320) | 0.59 (15) 4.9% |
| Circum. inches (mm) | 102.44 (2601.87) | 142.68 (3624.14) | 40.25 (1022.27) 39.3% |
| Sidewall Height inches (mm) | 4.8 (122) | 10.71 (272) | 5.91 (150) 123% |
| Revolutions per mile (km) | 618.53 (384.34) | 444.06 (275.93) | -174.47 (-108.41) -28.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 27.86 mph (44.83 km/h) |
| 25 mph (40.23 km/h) | 34.82 mph (56.04 km/h) |
| 30 mph (48.28 km/h) | 41.79 mph (67.25 km/h) |
| 35 mph (56.33 km/h) | 48.75 mph (78.46 km/h) |
| 40 mph (64.37 km/h) | 55.72 mph (89.67 km/h) |
| 45 mph (72.42 km/h) | 62.68 mph (100.87 km/h) |
| 50 mph (80.47 km/h) | 69.65 mph (112.08 km/h) |
| 55 mph (88.51 km/h) | 76.61 mph (123.29 km/h) |
| 60 mph (96.56 km/h) | 83.57 mph (134.5 km/h) |
| 65 mph (104.61 km/h) | 90.54 mph (145.71 km/h) |
| 70 mph (112.65 km/h) | 97.5 mph (156.92 km/h) |
| 75 mph (120.7 km/h) | 104.47 mph (168.12 km/h) |
| 80 mph (128.75 km/h) | 111.43 mph (179.33 km/h) |
| 85 mph (136.79 km/h) | 118.4 mph (190.54 km/h) |
| 90 mph (144.84 km/h) | 125.36 mph (201.75 km/h) |
| 95 mph (152.89 km/h) | 132.33 mph (212.96 km/h) |
| 100 mph (160.93 km/h) | 139.29 mph (224.17 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Better Fuel Economy Factory Ratios Increased Power
