Welcome to Bhaack

BACKGROUND

In 2010 I invented a new suspension system which promised significant performance benefits. This system was initially labelled Z-Link as it's linkages formed a "Z" in their nominal positions. It was later re-labelled VAST for Variable Anti Squat Technology due to the underlying performance benefit to better connect its name with its function.  
 

During 2019 significant development and testing was performed which validated the outcomes hoped for in this system - and especially the benefits of tailored anti-squat curve.
 

However, also in 2019 it was identified that another party had separately identified the same system and taken IP protection actions before I did. 

However in recent years Commencal has adopted this platform for their Meta V5 bike range.

Since then another 2 platforms have been developed which provide similar but different outcomes (system X and System Y).  These are being developed.

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What's different?

The systems I develop aim to improve on the balance of suspension systems around the sag point.    

Many bikes have linear anti squat curves and provide higher anti-squat outcomes near and above the sag point than what is required.  Although the outcomes from this situation are subtle, the high levels of anti squat at and above the sag point can result in "upwards" pedal bob.

Typically a rider cannot easily sense the shock movement that occurs, or many some riders even perceive that when the bike stands up under hard pedaling it's providing good pedaling support and efficiency.

But if close attention is paid, the rider might just be able to observe  upwards shock movement which saps energy (just like downwards shock movement does).  Another indicator, again if a rider pays close attention, is the increase in pedal force needed when pedaling over bumps and clearing obstacles caused by the excess in anti-squat.

To counter this effect a designer could reduce the anti squat of the system with tuning.  But for suspension systems providing linear anti squat profiles this will only increase the traditional downwards suspension squat under pedaling.

A flatter or non-linear anti-squat outcome like that delivered by some systems can reduce or eliminate some of these problems without causing any negative affects.

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