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A bike that fits everyone.

No compromises:

10 frame heights

and 3 frame lengths each.

Fashion & Fads

The fact is: In the MTB segment, bike sizes are now almost always specified in small, medium or large.

At the same time, every manufacturer designs how big their bikes should be in M or XL at their own whim.

In addition, trends set the tone today, with new models releasing almost every year. These are then always even better, even more potent, even more progressive, etc...

It is completely ignored that the riding characteristics of a bike are defined by the system of the individual: biker and bike, and thus have a unique effect on everyone.

There is a precise term for this kind of design: Fashion!

Bikes that fit

30 bike sizes and in no way inferior in design and function to the hydroformed aluminium frames and the full carbon frames.

With the VAIN, not only the top tube length, seat height, stack and reach change with each frame size, but also the chain stay length, seat angle and fork length.

The advantage: You are between 1.40m and 2.10m tall? Then don't fiddle with long stems or let yourself be set back beyond the rear wheel by wretchedly long seatposts.

Your inseam, shoulder height and arm length will give you a recommendation from 30 different sizes.

Bikes that fit


This matrix gives you an overview of how the size differences behave overall.


In a comparison

As an example, two bikers who are almost the same height but completely different in stature should choose a bike that fits to them.

We are assuming:

Biker A is 176 cm tall and compared to Biker B, who is 182 cm tall, has even shorter legs, while B has very long arms and legs.

The recommended frame size from a well-known brand is size M for both.

Biker A

The recommended size for A is a F1

Seat length: 602 mm

Seat height: 740 mm

Reach: 426 mm

Stack: 608 mm

Biker B

B with his long arms and legs ends at a frame size of G3

Seat length: 714 mm

Seat height: 768 mm

Reach: 531 mm

Stack: 623 mm



Modern composite construction of the frame. Top properties of several different materials in combination.

3D Printing

By using additive manufacturing (also known as 3D printing), the wall thicknesses of the joints can be designed to optimally dissipate moments of force at the connection points and reduce stress peaks in the components.


Precision Tubes

VAIN frames are made of top-quality stainless precision tubes and additively manufactured aluminium.

Thanks to the special mix of these materials, frame properties such as flexibility and stiffness can be determined locally and variably.


Bonded with industrial construction adhesive, the frame is no longer subject to any major heat effects during manufacture, such as when welding or soldering.

As a result, the material and the connection retain their original strength and the frame remains stress-free throughout the entire manufacturing process.

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