Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 125,710 pages of information and 196,433 images on early companies, their products and the people who designed and built them.
Royal Ajax were motorcycles produced by the Silver Queen Cycle Co of Gray's Inn Road, London, between 1904 and 1906.
The machine was a typical primitive fitted with a 2.5hp engine, upright in a cradle within the frame. It had belt drive and rigid forks and was probably an Alldays and Onions model with a different tank transfer.
It was only listed until 1906 and nothing more was heard of it.
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