Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 215/40-12 | 205/65-10 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 18.77 (476.8) | 20.49 (520.5) | 1.72 (43.7) 9.2% |
| Width inches (mm) | 8.46 (215) | 8.07 (205) | -0.39 (-10) -4.7% |
| Circum. inches (mm) | 58.97 (1497.91) | 64.38 (1635.2) | 5.41 (137.29) 9.2% |
| Sidewall Height inches (mm) | 3.39 (86) | 5.25 (133.25) | 1.86 (47.25) 54.9% |
| Revolutions per mile (km) | 1074.39 (667.59) | 984.19 (611.55) | -90.2 (-56.05) -8.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.83 mph (35.14 km/h) |
| 25 mph (40.23 km/h) | 27.29 mph (43.92 km/h) |
| 30 mph (48.28 km/h) | 32.75 mph (52.71 km/h) |
| 35 mph (56.33 km/h) | 38.21 mph (61.49 km/h) |
| 40 mph (64.37 km/h) | 43.67 mph (70.27 km/h) |
| 45 mph (72.42 km/h) | 49.12 mph (79.06 km/h) |
| 50 mph (80.47 km/h) | 54.58 mph (87.84 km/h) |
| 55 mph (88.51 km/h) | 60.04 mph (96.63 km/h) |
| 60 mph (96.56 km/h) | 65.5 mph (105.41 km/h) |
| 65 mph (104.61 km/h) | 70.96 mph (114.2 km/h) |
| 70 mph (112.65 km/h) | 76.42 mph (122.98 km/h) |
| 75 mph (120.7 km/h) | 81.87 mph (131.76 km/h) |
| 80 mph (128.75 km/h) | 87.33 mph (140.55 km/h) |
| 85 mph (136.79 km/h) | 92.79 mph (149.33 km/h) |
| 90 mph (144.84 km/h) | 98.25 mph (158.12 km/h) |
| 95 mph (152.89 km/h) | 103.71 mph (166.9 km/h) |
| 100 mph (160.93 km/h) | 109.17 mph (175.68 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
