Accepts P-Metric and Inches
215/30-20 | 165/40-18 | Difference | |
---|---|---|---|
Diameter inches (mm) | 25.08 (637) | 23.2 (589.2) | -1.88 (-47.8) -7.5% |
Width inches (mm) | 8.46 (215) | 6.5 (165) | -1.97 (-50) -23.3% |
Circum. inches (mm) | 78.79 (2001.19) | 72.88 (1851.03) | -5.91 (-150.17) -7.5% |
Sidewall Height inches (mm) | 2.54 (64.5) | 2.6 (66) | 0.06 (1.5) 2.3% |
Revolutions per mile (km) | 804.19 (499.7) | 869.43 (540.24) | 65.24 (40.54) 8.1% |
Speedometer Difference
Speedo Reading | Actual Speed |
---|---|
20 mph (32.19 km/h) | 18.5 mph (29.77 km/h) |
25 mph (40.23 km/h) | 23.12 mph (37.21 km/h) |
30 mph (48.28 km/h) | 27.75 mph (44.66 km/h) |
35 mph (56.33 km/h) | 32.37 mph (52.1 km/h) |
40 mph (64.37 km/h) | 37 mph (59.54 km/h) |
45 mph (72.42 km/h) | 41.62 mph (66.99 km/h) |
50 mph (80.47 km/h) | 46.25 mph (74.43 km/h) |
55 mph (88.51 km/h) | 50.87 mph (81.87 km/h) |
60 mph (96.56 km/h) | 55.5 mph (89.31 km/h) |
65 mph (104.61 km/h) | 60.12 mph (96.76 km/h) |
70 mph (112.65 km/h) | 64.75 mph (104.2 km/h) |
75 mph (120.7 km/h) | 69.37 mph (111.64 km/h) |
80 mph (128.75 km/h) | 74 mph (119.09 km/h) |
85 mph (136.79 km/h) | 78.62 mph (126.53 km/h) |
90 mph (144.84 km/h) | 83.25 mph (133.97 km/h) |
95 mph (152.89 km/h) | 87.87 mph (141.42 km/h) |
100 mph (160.93 km/h) | 92.5 mph (148.86 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 |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2213 | 2570 | 2768 | 2890 | 3022 | 3116 | 3220 | 3342 | 3512 | 3681 | 3870 | 4020 | 4293 | 4595 | 4830 | 4981 | 5065 | 5376 | 5809 | 6751 |
Better Fuel Economy Factory Ratios Increased Power