The BSA Road Rocket was a 1950s 646 cc (39.4 cu in) air-cooled parallel twin motorcycle designed by Bert Hopwood and produced by Birmingham Small Arms Company (BSA) at Small Heath, Birmingham.

The A10 had a reputation for reliability but was struggling to compete against the Triumph engines and the Norton Featherbed frames.

[2] Unlike the Golden Flash, the inlet manifold was separate from the cylinder head[7] enabling twin carburettors to be fitted if required.

[9] It had high compression pistons and a higher lift camshaft with the 356 "sports" profile.

[10] These engine modifications raised the power output to 40 bhp (30 kW)[2] and a top speed of 109 mph (175 km/h).