over an extensive area even when the snowboard is in a deformed state an insert of a second material 43 according to the present invention is influencing the mechanical behaviour the lateral part the lateral part 3 may be in mechanical connection with the surface 20 over a single or over several interaction areas 44 if appropriate the at least one lateral part is exchangeable 0031 fig6 illustrates a cut through a spacer according to fig1 and a binding plate 42 in the radial rim 27 elastic elements 45 are incorporated the central part 2 is resting on elastic elements 45 the binding plate 42 is in normal state in contact with the central part 2 and the second pad 8 of the lateral part 3 the elastic elements 45 are due to their embodiment relatively easy compressible compared to the second pad 8 such that under external force the binding plate is mainly in mechanical contact with the lateral part 3 by this the main load path of the compression loads is guided into the lateral part 3 and from this distributed into a snowboard not visible in this figure 0032 fig7 illustrates the bottom of the spacer according to figures 1 and 6 the numbers are therefore according to fig1 and 6 the lateral parts 3 are in this embodiment made as shells such that they are flexible and adjustable the interaction area 44 of this embodiment is essentially kidney shaped with various wall thicknesses as it can be seen the first pads 7 are extending to the back of the lateral part 3 compared to.