The 5" Pemco "KasterKat" Shopping Cart Caster features a molded, red annular ring mixed with polyurethane, between the hub and our premium polyurethane tread. This process provides both a chemical bond and a mechanical lock between the tread and hub. The red annular ring also provides the
smoothest rolling surface, with additional shock absorbing features not
found in competitor’s wheels.
These feature a double raceway bearing that is insert-molded into our
polypropylene hub. This bearing is a single spindle design that cannot
become misaligned with use. It is also sealed on both sides after being
pre-lubricated with our high-quality grease.