Technology / Motorcycle / Step-Thru: Motorbike frame layout with a low structure between the seat and the steering head often associated with scooters. On early machines it was commonly called an open frame.
Technology / Motorcycle / Scooter: Small, two-wheeled, utilitarian motorbike with a step-thru frame. MORE
Entertainment / Bowling / Open Frame: A frame in which the bowler doesn't get a strike or a spare. MORE