A bike trader can be a publication or website where people place and view advertisements to buy, sell and trade bicycles, motorcycles or dirt bikes. A bike trader could also refer to people who earn their living by buying, selling and transporting goods on a bicycle.
Automobiles are often bought and sold in transactions facilitated by popular AutoTrader publications and websites. Bike trader is a term used colloquially to describe all publications and websites that list advertisements about bicycles and motorcycles. There are many people in the developed and developing world who earn their living trading and delivering goods using bicycles. World Bicycle Relief calls bicycles "an engine for economic and cultural empowerment."