Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 215/40-15 | 250/40-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.77 (553) | 22.87 (581) | 1.1 (28) 5.1% |
| Width inches (mm) | 8.46 (215) | 9.84 (250) | 1.38 (35) 16.3% |
| Circum. inches (mm) | 68.4 (1737.3) | 71.86 (1825.27) | 3.46 (87.96) 5.1% |
| Sidewall Height inches (mm) | 3.39 (86) | 3.94 (100) | 0.55 (14) 16.3% |
| Revolutions per mile (km) | 926.35 (575.6) | 881.7 (547.86) | -44.64 (-27.74) -4.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.01 mph (33.82 km/h) |
| 25 mph (40.23 km/h) | 26.27 mph (42.27 km/h) |
| 30 mph (48.28 km/h) | 31.52 mph (50.72 km/h) |
| 35 mph (56.33 km/h) | 36.77 mph (59.18 km/h) |
| 40 mph (64.37 km/h) | 42.03 mph (67.63 km/h) |
| 45 mph (72.42 km/h) | 47.28 mph (76.09 km/h) |
| 50 mph (80.47 km/h) | 52.53 mph (84.54 km/h) |
| 55 mph (88.51 km/h) | 57.78 mph (93 km/h) |
| 60 mph (96.56 km/h) | 63.04 mph (101.45 km/h) |
| 65 mph (104.61 km/h) | 68.29 mph (109.9 km/h) |
| 70 mph (112.65 km/h) | 73.54 mph (118.36 km/h) |
| 75 mph (120.7 km/h) | 78.8 mph (126.81 km/h) |
| 80 mph (128.75 km/h) | 84.05 mph (135.27 km/h) |
| 85 mph (136.79 km/h) | 89.3 mph (143.72 km/h) |
| 90 mph (144.84 km/h) | 94.56 mph (152.17 km/h) |
| 95 mph (152.89 km/h) | 99.81 mph (160.63 km/h) |
| 100 mph (160.93 km/h) | 105.06 mph (169.08 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2244 | 2607 | 2807 | 2931 | 3065 | 3160 | 3265 | 3390 | 3561 | 3733 | 3924 | 4077 | 4354 | 4659 | 4898 | 5051 | 5137 | 5452 | 5891 | 6846 |
Better Fuel Economy Factory Ratios Increased Power
