The Active Power ZSR is High Tech simplicity. We started with a clean sheet of paper and designed a straight forward solution. We wrestled and wrestled with which direction to take.  Did we to build around "authentic" 40 year old technology or did we incorporate the advances in suspension design? This was our dilema. After much deliberation it really came down to tires. The advancements in tire technology just can’t be ignored. To duplicate suspension geometry that was intended to work with tires of the period would be a mistake.

In the 60’s suspension was designed around a tire with extreme sidewall deflection.  The tires of today have little or no deflection and the suspension needs to work with that. The trend in recent years has been around "Zero Scub Radius". This is why you see wheels with deep back spacing working with suspension that has zero or should we say minimum scrub radius. Zero Scrub Radius simply means that the king pin axis intersects the ground at or near the center of the tire patch.  The relationships between the tire manufacturers, the race engineers and the chassis designers is the pulse of motor racing. The results of those relationships feeding each other and advancing technology, has ended up in every GTR Coupe.