finished deck 12 with the formed central member 16 operatively engaged within the veneer 18 layers different types of spring steel or composite materials may be used conforming to various aisi and sae standards yielding different resistance and spring characteristics depending on the length and thickness and width of the member 28 employed further carbon fibers or other synthetic fabrics operatively engaged with a resin to form a composite elongated member 28 can provide similar characteristics which may be varied consequently great adjustability as to the ride characteristics of the finished deck 12 can be achieved by varying the metal or composite employed to form the elongated member 28 the composite construction the material thickness and the width of the composite or metal used the device as shown in fig1 and 3 shows two elongated members 28 parallel to each other and the axis 14 and sandwiched between the cross members 26 of two central members 16 the ride and torque around the axis 14 and spring along the axis 14 of the formed deck 12 can also be altered by changing the number and spacing of the formed cross members 26 as such a means for adjustment of torque resistance around the axis 14 and spring or flex characteristics along the axis 14 is provided by changing the materials employed to form the elongated members 28 and the composite materials of the flexible members 22 employed and especially by the placement and number of cross members 26 engaging the parallel elongated members 28 sandwiched there between in a current preferred mode of the device 10 the exceptional improvements in performance for spring flex and twisting and shock absorbing characteristics with a rider on the deck 12 have been.