Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 215/40-15 | 155/30-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.77 (553) | 18.66 (474) | -3.11 (-79) -14.3% |
| Width inches (mm) | 8.46 (215) | 6.1 (155) | -2.36 (-60) -27.9% |
| Circum. inches (mm) | 68.4 (1737.3) | 58.63 (1489.11) | -9.77 (-248.19) -14.3% |
| Sidewall Height inches (mm) | 3.39 (86) | 1.83 (46.5) | -1.56 (-39.5) -45.9% |
| Revolutions per mile (km) | 926.35 (575.6) | 1080.74 (671.54) | 154.39 (95.93) 16.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 17.14 mph (27.59 km/h) |
| 25 mph (40.23 km/h) | 21.43 mph (34.49 km/h) |
| 30 mph (48.28 km/h) | 25.71 mph (41.38 km/h) |
| 35 mph (56.33 km/h) | 30 mph (48.28 km/h) |
| 40 mph (64.37 km/h) | 34.29 mph (55.18 km/h) |
| 45 mph (72.42 km/h) | 38.57 mph (62.07 km/h) |
| 50 mph (80.47 km/h) | 42.86 mph (68.97 km/h) |
| 55 mph (88.51 km/h) | 47.14 mph (75.87 km/h) |
| 60 mph (96.56 km/h) | 51.43 mph (82.77 km/h) |
| 65 mph (104.61 km/h) | 55.71 mph (89.66 km/h) |
| 70 mph (112.65 km/h) | 60 mph (96.56 km/h) |
| 75 mph (120.7 km/h) | 64.29 mph (103.46 km/h) |
| 80 mph (128.75 km/h) | 68.57 mph (110.36 km/h) |
| 85 mph (136.79 km/h) | 72.86 mph (117.25 km/h) |
| 90 mph (144.84 km/h) | 77.14 mph (124.15 km/h) |
| 95 mph (152.89 km/h) | 81.43 mph (131.05 km/h) |
| 100 mph (160.93 km/h) | 85.71 mph (137.94 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
