1800s TRUSS-TUBES & CENTRAL-DRIVE BICYCLES

TRUSS-TUBE DESIGNS

In the safety bicycle’s first decade, various innovations were attempted in order to strengthen a bicycle’s frame. There was pressure to reduce the weight of the bicycle: remember that these machines had to be pushed up hills! So frame tubing became lighter each year and potentially weaker too. The diamond frame therefore predominated over the earlier crossframe design, and a popular idea around 1890 was the Split Seat-Tube design, also known as a Truss-Tube. It did provide a stronger machine but, unfortunately, this extra bracing also added weight to the bicycle so it was a short-lived concept that only lasted a few years, from 1889 too 1892.

There were a number of variations in design, some bicycles – such as the 1889 Humber, illustrated below – having split tubing for the seat tube and the down tube too.

Photo below: 1890 New Phoenix

 

Photo below: 1890 Brookes Diamond Frame (with patent concealed brake)

Photo below: 1890 Jackson Fleet

 

Photo below: 1890 North Road Cycles ‘Design B’

Photo below: Some bicycles, such as the 1890 Reynolds Double Tube ‘Diamond Sprite,’ had twin tubing all round

 

Photo below: 1890 Guest & Barrow Girder. You can see how this double-tubing design also led to ‘girder’ framed machines, influencing cross-frame design at the turn of the century.

Photo below: 1891 Norton & Sons

Photo below: 1891 Stanley Goodwin

Photo below: 1892 Halliwell of Brighton. The twin tubed down tube design also gave rise to centrally-located chainwheels, an idea imported from earlier tricycle design.

Photo below: 1892 Mecredy Energetic

Photo below: 1892 Starley Bros ‘Psycho’