British Roadless was a motorcycle produced in 1920.
This short-lived machine was an early experiment in tracked motorcycles. It propelled itself with a rubber V-belt that ran around the front and rear wheels. These were formed as pulleys with a series of miniature bogies on the lower run. It was fitted with a 348cc Douglas flat-twin engine mounted above the rear wheel and was steered by turning the front wheel a little. As it lacked both grip and stability, it was not around for long.
Sources of Information
The British Motorcycle Directory - Over 1,100 Marques from 1888 - by Roy Bacon and Ken Hallworth. Pub: The Crowood Press 2004 ISBN 1 86126 674 X