How to choose the size of your fixie / singlespeed bike frame?

When buying a new bike or frame, there always comes the fundamental question of which size to choose.

The decisive criterion is the size of the crotch , the size of the cyclist is indicative and provides a benchmark by proportionality.

For an urban bike, an adult should find their frame size by applying the formula:
Frame size = Inseam measurement in cm x 0.66

The bike is not just a calculation, the frame size given is indicative, it is better to try to know your frame size.

This gives us the following table:

Rider size	Inseam size	Frame size
152 to 160cm	About 73cm	46cm
160 to 163cm	About 75cm	48cm
163 to 167cm	About 77cm	50cm
167 to 175cm	About 80cm	52cm
175 to 180cm	About 83cm	54cm
181 to 182 cm	About 86cm	56cm
183 to 189cm	About 90cm	58cm
189 to 192cm	About 93cm	60cm
192 to 200cm	About 97cm	62cm
200cm or more	About 100cm	64cm

Frame size is actually the measurement from the bottom bracket spindle to the end of the seat tube .

The rest of the tubes of the bicycle are proportional to the latter, so we can refer to the size of the seat tube to choose a bicycle adapted to its size.