Technology - Trucks
The inherent tradeoff between stability and turnability of all current kingpin based skateboard trucks created a significant barrier between the performance capability of available equipment and the type of riding that was desired. This desire to expand the performance envelope of skateboards and overcome the obstacles that stood in the way of creating the extreme skiing type of experience on summer asphalt started a multi-decade effort to develop the perfect board.
Over 30 years many solutions were conceived and tested. These included a vast array of modified trucks utilizing gears, springs, elastomers, hinges and pivots. Many designs represented significant improvements over existing technologies. In fact several of the designs made their way into the marketplace independently of their efforts. The goal was to resolve the turnability vs. stability paradox so the development effort continued.
After exhausting all ideas relative to modifying or fixing the base of all skateboard trucks, the king pin, it became apparent that the limitation is inherent to the king pin itself. The search for a solution quickly began to take new directions. New designs were conceived prototyped and tested. Many worked but exhibited new problems.
In the summer of 2008 a design utilizing pivot pins showed clear advantages. Consisting of two pivot pins resting on the axle, it exhibited exceptional stability and had the potential for extreme turnability. Turning radius reduced to a quarter of what was possible with a king pin based truck. As development continued a provisional patent was filed.
As the spacing between the pivot pins and tilt angle was being optimized it became apparent that a single set of pivot pins would not provide the optimal solution. This led to the development of a truck with staggered sets if pivot pins. This design quickly lead to the true "eureka" moment. An infinite number of pivot pin sets was needed, i.e. we needed a cam.
The innovation of the rolling pivot cam had it all, rock solid stability with extreme turnability. The cam provided many advantages. Making the cam out of an elastomer provided additional damping and ride smoothing. By changing the shape of the cam the relationship between deck angle tip and change in turning radius could be selected. By changing the profile of the cam, the performance of the board could be optimized for different types of riding and rider personal preferences. The development of this cam was included in the full patent application filed in 2009.
This is an early model of the Revolution truck concept. In this model the cam is on the hanger and contacts the flat surface of the base plate. In our production model the cam is a customizable and replaceable component attached to the baseplate and the hanger surface is flat.The mechanics and functionality are the same.
NOTES: Hanger angle makes a significant difference in turning radius. Doubling the hanger angle reduces turning radius by almost half. Deck wheelbase has a small but noticeable effect on turning radius. Changing from a long deck to a short one will reduce turning radius by about 15%. A turning radius of less than 8' is needed to stay on a 3' wide sidewalk around a 90 degree corner.