The bike was both easy to ride and to maintain, attributes that helped make this bike the preferred means of transport by Britain’s working masses. With its two-speed transmission and dual brakes operating on the rear wheel, this popular BSA was equipped with a 250cc side-valve engine.

In 1926, BSA launched a three-speed variant of the “Round Tank”, which when combined with the nimble engine, the light-weight structure, chain transmission and a new lubrication system, made the model B even more desirable.

The bike in the Museu do Caramulo is one of the early versions of the “Round Tank” design, which acquired the name from the unique shape of its fuel tank. Although the bike’s journey since 1926 hasn’t been well documented, it was nonetheless acquired in June of 1967, from Francisco Metelo de Póvoa e Meadas. The motorcycle was then faithfully restored one year later, and much later on after that, found itself in the museum’s collection, courtesy of Pedro Cruz.