Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/40-23 | 340/85-28 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.61 (828.2) | 50.76 (1289.2) | 18.15 (461) 55.7% |
| Width inches (mm) | 12.01 (305) | 13.39 (340) | 1.38 (35) 11.5% |
| Circum. inches (mm) | 102.44 (2601.87) | 159.45 (4050.14) | 57.02 (1448.27) 55.7% |
| Sidewall Height inches (mm) | 4.8 (122) | 11.38 (289) | 6.57 (167) 136.9% |
| Revolutions per mile (km) | 618.53 (384.34) | 397.36 (246.9) | -221.18 (-137.43) -35.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 31.13 mph (50.1 km/h) |
| 25 mph (40.23 km/h) | 38.92 mph (62.63 km/h) |
| 30 mph (48.28 km/h) | 46.7 mph (75.15 km/h) |
| 35 mph (56.33 km/h) | 54.48 mph (87.68 km/h) |
| 40 mph (64.37 km/h) | 62.27 mph (100.21 km/h) |
| 45 mph (72.42 km/h) | 70.05 mph (112.73 km/h) |
| 50 mph (80.47 km/h) | 77.83 mph (125.26 km/h) |
| 55 mph (88.51 km/h) | 85.61 mph (137.78 km/h) |
| 60 mph (96.56 km/h) | 93.4 mph (150.31 km/h) |
| 65 mph (104.61 km/h) | 101.18 mph (162.84 km/h) |
| 70 mph (112.65 km/h) | 108.96 mph (175.36 km/h) |
| 75 mph (120.7 km/h) | 116.75 mph (187.89 km/h) |
| 80 mph (128.75 km/h) | 124.53 mph (200.41 km/h) |
| 85 mph (136.79 km/h) | 132.31 mph (212.94 km/h) |
| 90 mph (144.84 km/h) | 140.1 mph (225.46 km/h) |
| 95 mph (152.89 km/h) | 147.88 mph (237.99 km/h) |
| 100 mph (160.93 km/h) | 155.66 mph (250.52 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
