From Longman Dictionary of Contemporary Englishhandlebarshan‧dle‧bars /ˈhændlbɑːz $ -bɑːrz/ ●○○ noun [plural] (also handlebar [countable]) 
TTBTTCthe bar above the front wheel of a bicycle or motorcycle that you turn to control its direction
TTBTTCthe bar above the front wheel of a bicycle or motorcycle that you turn to control its directionExamples from the Corpus
handlebars• It was shiny metal, with a large black leather seat and huge black handlebars.• She took a helmet from the handlebars.• Louise was carrying a large bag which she had managed to balance on the handlebars of her scooter.• Diamond Jim Brady ordered her a gold-plated bicycle, with her monogram set in diamonds and emeralds on the handlebars.• In another case, two police officers spotted a man cycling without his hands on the handlebars.• The trike skidded and tumbled, throwing Grimm over the handlebars.• Even in a bulky warm-up suit, sitting hunched over the handlebars, she looks skinny.• The tendency for anyone unused to such enormous forces is literally to be thrown over the handlebars. 