Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 215/40-15 | 215/30-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.77 (553) | 20.08 (510) | -1.69 (-43) -7.8% |
| Width inches (mm) | 8.46 (215) | 8.46 (215) | 0 (0) 0% |
| Circum. inches (mm) | 68.4 (1737.3) | 63.08 (1602.21) | -5.32 (-135.09) -7.8% |
| Sidewall Height inches (mm) | 3.39 (86) | 2.54 (64.5) | -0.85 (-21.5) -25% |
| Revolutions per mile (km) | 926.35 (575.6) | 1004.45 (624.14) | 78.1 (48.53) 8.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.44 mph (29.68 km/h) |
| 25 mph (40.23 km/h) | 23.06 mph (37.11 km/h) |
| 30 mph (48.28 km/h) | 27.67 mph (44.53 km/h) |
| 35 mph (56.33 km/h) | 32.28 mph (51.95 km/h) |
| 40 mph (64.37 km/h) | 36.89 mph (59.37 km/h) |
| 45 mph (72.42 km/h) | 41.5 mph (66.79 km/h) |
| 50 mph (80.47 km/h) | 46.11 mph (74.21 km/h) |
| 55 mph (88.51 km/h) | 50.72 mph (81.63 km/h) |
| 60 mph (96.56 km/h) | 55.33 mph (89.05 km/h) |
| 65 mph (104.61 km/h) | 59.95 mph (96.47 km/h) |
| 70 mph (112.65 km/h) | 64.56 mph (103.89 km/h) |
| 75 mph (120.7 km/h) | 69.17 mph (111.32 km/h) |
| 80 mph (128.75 km/h) | 73.78 mph (118.74 km/h) |
| 85 mph (136.79 km/h) | 78.39 mph (126.16 km/h) |
| 90 mph (144.84 km/h) | 83 mph (133.58 km/h) |
| 95 mph (152.89 km/h) | 87.61 mph (141 km/h) |
| 100 mph (160.93 km/h) | 92.22 mph (148.42 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
