腳輪是一種無驅動的，采用單個的輪子，或雙輪，或更多的輪子組合在一起的，用于安裝在一個較大的對象下面（這個對象，我們通常定義為“車”），以便使該對象能方便的移動。對于腳輪的輪子，常常采用橡膠輪，鑄鐵輪，聚氨酯輪，尼龍塑料輪，不銹鋼輪，酚醛樹脂輪等材質（關于腳輪的輪子材質，我們萬達輪業將在以后的腳輪講座中詳細描述）。腳輪的應用廣泛，包括倉儲物流，超市購物車，家具家私等設備，同時重型腳輪也被應用于平臺車，手推車，集裝箱等設備（關于腳輪的應用，我們萬達輪業也會在以后的腳輪講座與大家一起探討）。一般而言，腳輪對于工作的輪面環境要求較為平坦，以便能靈活運轉。當然，隨著社會的發展，對工作設備的更高要求，腳輪的設計也有了更為特殊的方案，例如減震腳輪，V型腳輪等（關于這些特殊設備腳輪，也會在以后的腳輪講座中展開更為廣泛的討論）。

百科全書對腳輪的解釋

　A caster (or castor) is an undriven, single, double, or compound wheel that is designed to be mounted to the bottom of a larger object (the "vehicle") so as to enable that object to be easily moved. They are available in various sizes, and are commonly made of rubber, plastic, nylon, aluminum, or stainless steel. Casters are found in numerous applications, including shopping carts, office chairs, and material handling equipment. High capacity, heavy duty casters are used in many industrial applications, such as platform trucks, carts, assemblies, and tow lines in plants. Generally, casters operate well on smooth and flat surfaces。