Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 215/40-15 | 395/40-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.77 (553) | 27.44 (697) | 5.67 (144) 26% |
| Width inches (mm) | 8.46 (215) | 15.55 (395) | 7.09 (180) 83.7% |
| Circum. inches (mm) | 68.4 (1737.3) | 86.21 (2189.69) | 17.81 (452.39) 26% |
| Sidewall Height inches (mm) | 3.39 (86) | 6.22 (158) | 2.83 (72) 83.7% |
| Revolutions per mile (km) | 926.35 (575.6) | 734.96 (456.68) | -191.38 (-118.92) -20.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 25.21 mph (40.57 km/h) |
| 25 mph (40.23 km/h) | 31.51 mph (50.71 km/h) |
| 30 mph (48.28 km/h) | 37.81 mph (60.85 km/h) |
| 35 mph (56.33 km/h) | 44.11 mph (70.99 km/h) |
| 40 mph (64.37 km/h) | 50.42 mph (81.14 km/h) |
| 45 mph (72.42 km/h) | 56.72 mph (91.28 km/h) |
| 50 mph (80.47 km/h) | 63.02 mph (101.42 km/h) |
| 55 mph (88.51 km/h) | 69.32 mph (111.56 km/h) |
| 60 mph (96.56 km/h) | 75.62 mph (121.71 km/h) |
| 65 mph (104.61 km/h) | 81.93 mph (131.85 km/h) |
| 70 mph (112.65 km/h) | 88.23 mph (141.99 km/h) |
| 75 mph (120.7 km/h) | 94.53 mph (152.13 km/h) |
| 80 mph (128.75 km/h) | 100.83 mph (162.27 km/h) |
| 85 mph (136.79 km/h) | 107.13 mph (172.42 km/h) |
| 90 mph (144.84 km/h) | 113.44 mph (182.56 km/h) |
| 95 mph (152.89 km/h) | 119.74 mph (192.7 km/h) |
| 100 mph (160.93 km/h) | 126.04 mph (202.84 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1870 | 2173 | 2340 | 2443 | 2555 | 2634 | 2722 | 2825 | 2969 | 3112 | 3271 | 3398 | 3629 | 3884 | 4083 | 4210 | 4282 | 4545 | 4911 | 5707 |
Better Fuel Economy Factory Ratios Increased Power
