Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 38/13.5-20 | 405/25-24 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 38.1 (967.62) | 31.97 (812.1) | -6.12 (-155.52) -16.1% |
| Width inches (mm) | 13.5 (343) | 15.94 (405) | 2.44 (62) 18.1% |
| Circum. inches (mm) | 119.68 (3039.87) | 100.44 (2551.29) | -19.24 (-488.58) -16.1% |
| Sidewall Height inches (mm) | 9.05 (229.81) | 3.99 (101.25) | -5.06 (-128.56) -55.9% |
| Revolutions per mile (km) | 529.41 (328.96) | 630.8 (391.96) | 101.38 (63) 19.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 16.79 mph (27.01 km/h) |
| 25 mph (40.23 km/h) | 20.98 mph (33.77 km/h) |
| 30 mph (48.28 km/h) | 25.18 mph (40.52 km/h) |
| 35 mph (56.33 km/h) | 29.37 mph (47.27 km/h) |
| 40 mph (64.37 km/h) | 33.57 mph (54.03 km/h) |
| 45 mph (72.42 km/h) | 37.77 mph (60.78 km/h) |
| 50 mph (80.47 km/h) | 41.96 mph (67.53 km/h) |
| 55 mph (88.51 km/h) | 46.16 mph (74.29 km/h) |
| 60 mph (96.56 km/h) | 50.36 mph (81.04 km/h) |
| 65 mph (104.61 km/h) | 54.55 mph (87.79 km/h) |
| 70 mph (112.65 km/h) | 58.75 mph (94.55 km/h) |
| 75 mph (120.7 km/h) | 62.95 mph (101.3 km/h) |
| 80 mph (128.75 km/h) | 67.14 mph (108.05 km/h) |
| 85 mph (136.79 km/h) | 71.34 mph (114.81 km/h) |
| 90 mph (144.84 km/h) | 75.53 mph (121.56 km/h) |
| 95 mph (152.89 km/h) | 79.73 mph (128.32 km/h) |
| 100 mph (160.93 km/h) | 83.93 mph (135.07 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1605 | 1865 | 2008 | 2097 | 2193 | 2261 | 2336 | 2425 | 2548 | 2671 | 2807 | 2917 | 3115 | 3333 | 3504 | 3614 | 3675 | 3900 | 4215 | 4898 |
Better Fuel Economy Factory Ratios Increased Power
