sentences:  The stem and bars are a single unit and where the single top section of the stem would be, there are instead 2 bars joined at the quill to the rear and connected to the conventional handlebar section in the front, at two off-center locations, forming a triangle.This type of handlebar is usually very large, allowing for an easy breath intake under stress.However, being heavier than contemporary flat or riser bars and being less customizeable in height and distance from the body of the rider, they progressively disappeared.