Calculates the size bicycle mtb / mountain, road and urban.
Keep in mind that the size of the bike between two different manufacturers may vary, as there are manufacturers that make carving measuring from the bottom bracket to the steering stem and others do it to the center of the horizontal pipe, varying by more than one inch from one manufacturer to another.
Many manufacturers called their bikes carvings by letters, it is usually easy access to the manufacturer's website to obtain the equivalence of their sizes in the action letter with standpipe that determines the actual size.
A rough reference letter sizes in the numerical size would be:
|XS||14" - 14.5"||39|
|S||15" - 16.5"||39 - 43|
|M||17" - 18.5"||43 - 47|
|L||19" - 20.5"||47 - 51|
|XL||21" - 22.5"||51 - 55|
|XXL||24" - 24.5"|
Does the doubt?
It would be strange bicycle size obtained by calculating exact size correspond exactly to a size of bike frame.. For example we get the size 19 inches and the bike we want only manufactured in sizes 18" and 20". In this case'll pick the smallest size because it will be easier to get the right position on the bike with a picture of a smaller size, regulating longuitud triple clamp and pontencia.
In any case, the test on the bike is the best choice.
When buying a bike is very important the right choice of size as this will take us to enjoy more comfort, better performance in addition to avoid pain and injury.
Often considered a determinant rider height, but can give a reference about the size is more important as the crotch and forearm when choosing the correct bike size.
The size of the mountain bike usually comes in inches, being the most important measure riser height, to determine the other dimensions of the box and is what determines the size of the bicycle.
In the case of road bike size is usually expressed in inches again taking as important as the vertical tube of the frame.
Urban bikes must be more comfortable for it take more upright posture, in this case the handlebars above the seat stay. Also allow us to support the feet comfortably on the floor because the stops, traffic, pedestrians .... will be more frequent.
The kids bikes , the measures obtained here will no safety or comfort the child who is learning to ride. In this case the values ??obtained will be reduced so that the child can fully support the soles of the feet sitting on the bike.
Although it is possible to make a detailed study of sizing and positioning on the bike, give a reference to the size and settings of the bike used only two measures:
How to obtain the size of the crotch?
This should be done barefoot. Support us on a wall to make it easier, we measure from the ground to the point where we rely on the saddle when the bike rode.
(We can help the spine of a book, a ruler, a stick-on which 'we ride' against the wall and take the reference point on the wall of the upper back of the book.)
How to make the measurement of the forearm?
Simply we measure from the elbow to the middle finger, the back of the arm. We facilitate the process angled support arm with hand outstretched on the table so far obtained more easily.
How to put the saddle?
The saddle should be placed completely horizontal to the ground, ie should not point neither up nor down. We could even help from one level to find its parallel with the ground.
The height and setback of the saddle relative to the bottom bracket will come determined by the size of the forearm and leg length, for this we will use the measurements obtained using the above instructions. Taking our bike the dimension obtained recoil being the difference between the center of the bottom bracket and the nose of the saddle.