An embodiment relates to a tire in which kerf space can be secured after tread wear without a decrease in block rigidity. The tire provided with 3D kerfs combining interlocking bands and hidden groove-type kerfs according to an embodiment comprises: kerfs ...

An embodiment provides a wheel module comprising: a body; a connection part which is rotatably coupled to the body, the connection part being rotatable in a first direction; a wheel body which is rotatably coupled to the connection part, the wheel body bei...