An Ariel Square cc with a large sidecar c The bike caused a sensation when first shown at the Motorcycle show at Olympia London The four aircooled cylinders were set in a square formation and the ohv gear was operated by a chaindriven camshaft The Square remained in production until The company was founded by James Starley and William Hillman in to make bicycles and the first patented tensioned wirespoke wheel Ariel first made a powered tricycle in using a de Dion engine They made their first motorized twowheeler in powered by Kerry engines selling them in The company closed in