Abstract: A wheel assembly (10) designed to enable adaptation of various width wheels and various type tires on any one of a variety of miniature vehicles (12) includes an adapter hub (14) for mounting the wheel on an axle (54) of a specific miniature vehicle (12). Adapter hub (14) has standardized wheel mounting elements (18, 20). Each wheel includes a pair of rims (24, 24') arranged back-to-back with each rim having standardized spider portions (30) for mounting to the standardized wheel mounting elements. Circumferential peripheral surfaces 28 exhibit circumferential tire bead (36) receiving grooves between flanges (25, 26). For mounting foam type tires (38) the flanges (25, 26) are provided with spline receiving notches (42) for accepting splines (44) on a foam tire insert (46) adhesively secured within a foam tire (38).

Abstract: An air cleaner for miniature internal combustion engines to be used on model boats, airplanes, and the like, which is comprised of a tubular elastic boot and a removable filter unit. One end of the tubular elastic boot is stretched over and sealingly attached to the air inlet of the engine. Into the other end of the elastic boot member is inserted the filter unit so that all the air entering the engine must pass through the filter. The filter unit is comprised of a porous open cell foam medium which is supported on a peripheral flange to sealingly engage the elastic boot member.