Mountain Bike Frame Geometry

February 5, 2009 by  
Filed under Frames

When designing any basic hardtail mountain bike there are several important geometric aspects to consider. As soon as a decision is made to design a bike with rear suspension, then a number of dynamic factors must also be considered. The relevance and importance of the dynamic constraints becomes even more crucial as the amount of rear wheel travel increases to the amount required to compete in the extreme-freeride and downhill race markets.

The most important parameters such as lengths and angles considered during basic frame design are shown in Figure 5.

mountain bike frame geometry Mountain Bike Frame Geometry

The dimensions of the front triangle on a well designed frame should be governed by the geometry of human bodies, and designed to be ergonomic in order to provide comfort and control. As a result most bikes are designed in three or more different sizes to suit people of all shapes and sizes.

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