comprise of hardened aluminum brass bronze or other hardenable material or alloy crystalline plastic or various other materials with a hardenable surface or composition which provides adequate strength to support a skater 39 s weight and sufficient wear properties for contact with a weight bearing rotational means in the preferred embodiment of fig1 lever springs 7 comprise of spring steel or music wire or other suitable and commonly used spring material able to withstand repeated loading and unloading without significant loss of spring force however lever springs 7 can comprise of stainless steel steel aluminum brass bronze or other metal plastic or alloy plastic laminate rubber synthetic rubber or elastomer or can be replaced by compression springs or extension springs fixed in such fashion as to provide a spring force upon axle 6 or wheel 10 additionally extension or compression springs can be positioned on any part of the linkage formed by axle 6 and linkage 11 to achieve the desired spring force required to hold axle 6 at one end of slots 5 in the preferred embodiment of fig1 lever springs 7 are held in place by clamps 12 which comprise of a slotted shaft 13 and a nut 14 in the preferred embodiment of fig1 clamps 12 are comprised of hardened steel or similar hardenable material such as aluminum brass or bronze however clamps 12 can comprise of steel or other metal plastic crystalline plastic or other various materials of sufficient strength able to withstand clamping forces in the preferred embodiment of fig1 pins 15 act as fulcrums points for lever springs 7 and comprise of steel or aluminum however various.