Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 135,172 pages of information and 215,041 images on early companies, their products and the people who designed and built them.
Rainbow was a prototype motorcycle built in 1950, by a gentleman of that name.
The machine was a form of step-through fitted with a 99cc Villiers two-speed engine unit that went under a cover. It had a tubular frame, light girder forks and a 20-inch rear wheel to keep the saddle height down, while the front wheel was a 26-inch bicycle-type. It was also fitted with legshields.
Although the machine was well made, it failed to go into production.
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