The A-Series Chassis provides the reactive flex and power transfer of aluminum underfoot. The extruded aluminum heel-cup provides the ultimate toe-heel response. The A-Series Chassis was designed to be less rigid than previous designs allowing the aluminum to flex more under the riders weight allowing for a much more reactive ride. Because the Chassis is 100% aluminum, it is narrower than nylon or plastic chassis allowing the board to flex more freely from tip to tail.