Perks and Birch produced motorcycles between 1900 and 1901.
They were the originators of the idea to build the complete engine unit within the driving wheel. The single-cylinder engine was fitted between the spokes of an aluminium wheel, with eight to ten spokes on each side. A low-tension magneto provided the spark and the assembly could be fitted in place of the rear wheel of a bicycle or the front wheel of a tricycle.
The Singer Cycle Co took up the design in 1901.
Source: Graces Guide
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