Welcome to Bhaack
In early 2020 some new developments occurred. I have identifying two new systems that can provide Sag Centered Anti-squat Dynamics.
For now they will be known as System X and System Y.
Both of these systems offer more stable anti-squat outcomes throughout the systems travel.
UPDATE - Nov 2020
Concept development was completed on System X early in 2020.
Detailed prototype design has been slowed by COVID-19 but is still progressing.
Check back regularly for further updates.
SCAD offers improved pedaling efficiency by reducing pedal bob - not just downwards pedal bob, but upwards pedal bob too!
Never heard of it?
Many bikes provide higher anti-squat outcomes above the sag point than are required. This results in "upwards" pedal bob.
Typically a rider cannot 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 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.
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.
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 function and its name.
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. Therefore I cannot claim IP ownership to this system in the global context. It is yet to be seen within which jurisdictions the other party takes ownership of this IP.
Through the journey with the Z-Link system, it has become apparent that systems with tailored anti-squat curves around the sag point provide improved pedaling outcomes. In addition to this, the Z-Link system is not the only one that achieves this outcome. There are others on the market already (though they are limited), but often their performance advantages are not generally understood by the industry.
So rather, there is a family of systems that provide Sag Centered Anti-Squat Dynamics (SCAD).
I have since developed two new systems - System X and System Y which are being explored.
Contact Bhaack for more information.