When buying a new bike or frame, there always comes the fundamental question about the correct size.
The criterion determining is the inside leg mesurement, the height of the cyclist is indicative and a pointer is provided by proportionality.
For an urban bike, one should find its frame size by applying the formula:
Frame size = inside leg measurement in cm x 0.66
The bike is not about calculation, the size of the given frame is indicative, but it is good to try to know better the frame size.
Here's the table :
|152 - 160 cm||~ 73 cm||46 cm|
|160 - 163 cm||~ 75 cm||48 cm|
|163 - 167 cm||~ 77 cm||50 cm|
|167 - 175 cm||~ 80 cm||52 cm|
|175 - 180 cm||~ 83 cm||54 cm|
|181 - 182 cm||~ 86 cm||56 cm|
|183 - 189 cm||~ 90 cm||58 cm|
|189 - 192 cm||~ 93 cm||60 cm|
|192 - 200 cm||~ 97 cm||62 cm|
|200 cm +||~ 100 cm||64 cm|
The frame size is actually the measurement between the bottom bracket shaft and the end of the seat tube.
The rest of the tubes of the bike is proportional to the latter, hence we can refer the size of the seat tube to choose a bike adapted to its size.