Kmart 42839156 is a 40CM VIOLET BIKE designed for safe and enjoyable rides. It features various components like a bell, grips, crash pad, handlebar, stem, brake lever, reflectors, saddle, mudguards, down tube, seat post, heat set, seat binder, front mudguard, wheel reflector, brake, tire, chain cover, chain wheel, chain, training wheel, crank, pedal, rim, spoke, and front hub. It comes with a 12-month warranty and requires regular maintenance, including checking tire pressure, lubricating bearings, inspecting wheels for damage, and keeping the chain clean.