Most bicycles, tricycles and motorcycles have a tubular frame. The front fork (which holds the front wheel) pivots within the head tube . On a motorcycle, the "head tube" is normally called the steering head. On a bicycle the head badge is invariably mounted on the head tube.
Read more about Head Tube: Bearings, Castor Angle, Head Tube Diameters
Famous quotes containing the words head and/or tube:
“I believe no gentleman would like to have his family affairs neglected because his wife was filling her head with crotchets and pothooks, and who, because she understood a few scraps of Latin, valued that more than minding her needle or providing her husband’s dinner.”
—Sarah Fielding (1710–1768)
“Even crushed against his brother in the Tube the average Englishman pretends desperately that he is alone.”
—Germaine Greer (b. 1939)