Accepts P-Metric and Inches
225/40-18 | 205/40-18 | Difference | |
---|---|---|---|
Diameter inches (mm) | 25.09 (637.2) | 24.46 (621.2) | -0.63 (-16) -2.5% |
Width inches (mm) | 8.86 (225) | 8.07 (205) | -0.79 (-20) -8.9% |
Circum. inches (mm) | 78.81 (2001.82) | 76.83 (1951.56) | -1.98 (-50.27) -2.5% |
Sidewall Height inches (mm) | 3.54 (90) | 3.23 (82) | -0.31 (-8) -8.9% |
Revolutions per mile (km) | 803.94 (499.54) | 824.65 (512.41) | 20.71 (12.87) 2.6% |
205/40-18 Tires
Speedometer Difference
Speedo Reading | Actual Speed |
---|---|
20 mph (32.19 km/h) | 19.5 mph (31.38 km/h) |
25 mph (40.23 km/h) | 24.37 mph (39.22 km/h) |
30 mph (48.28 km/h) | 29.25 mph (47.07 km/h) |
35 mph (56.33 km/h) | 34.12 mph (54.91 km/h) |
40 mph (64.37 km/h) | 39 mph (62.76 km/h) |
45 mph (72.42 km/h) | 43.87 mph (70.6 km/h) |
50 mph (80.47 km/h) | 48.74 mph (78.45 km/h) |
55 mph (88.51 km/h) | 53.62 mph (86.29 km/h) |
60 mph (96.56 km/h) | 58.49 mph (94.14 km/h) |
65 mph (104.61 km/h) | 63.37 mph (101.98 km/h) |
70 mph (112.65 km/h) | 68.24 mph (109.83 km/h) |
75 mph (120.7 km/h) | 73.12 mph (117.67 km/h) |
80 mph (128.75 km/h) | 77.99 mph (125.51 km/h) |
85 mph (136.79 km/h) | 82.87 mph (133.36 km/h) |
90 mph (144.84 km/h) | 87.74 mph (141.2 km/h) |
95 mph (152.89 km/h) | 92.61 mph (149.05 km/h) |
100 mph (160.93 km/h) | 97.49 mph (156.89 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 |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2099 | 2438 | 2625 | 2742 | 2867 | 2956 | 3054 | 3170 | 3331 | 3492 | 3670 | 3813 | 4072 | 4358 | 4581 | 4724 | 4804 | 5099 | 5510 | 6403 |
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