Manufactured by Birmingham Motor Manufacturing and Supply Co 1900 to 1921. The company was founded by brothers William and Harold Williamson as a car manufacturer
in Coventry, in 1899.
Rex was one of the first and foremost manufacturers of motorcycles in Britain. Their advertising slogan read 'The King of
British motors', and the firm was a true market leader in design and development.
1900 The marque, built by the Birmingham Motor Manufacturing and Supply
Company, made its debut at the National Show, Crystal Palace, London. It
was a forward-sloping, four-stroke engine positioned within the frame of
a safety cycle.
1902 The company, having joined forces with Allard,
moved its factory to Earlsdon, Coventry. They then redesigned the model
so that the engine was vertically positioned ahead of the bottom bracket.
1903 The design was changed and a 'beehive' silencer added, so that it
was incorporated into the right side of the cylinder. Thus, the model had
an unconventional exhaust and silencer. That year also brought the arrival
of air-ducted engine cooling. A Rex was entered for the Paris-Madrid
race, but failed to start.
1904 A combination tool and battery box was fitted between the seat tube,
chain stays and rear mudguard on a machine with a 3.25hp engine. Harold
Williamson set a new End-to-End record, which he kept until 1908.
1909 Walter Bentley, known later for his cars (and more importantly, alloy pistons), raced Rex motorcycles around this time
1910 Following further expansion, a new engine cradle was introduced. This
replaced an outdated version that had been in use since 1902. They also
produced 499cc two-stroke RexValveless with magneto ignition.
This was eventually sold as the PMC.
1911 The Company fired the founders after a boardroom row and with them
went a lot of the company's prestige. William went on to form the Williamson motorcycle company and Harold Williamson joined Singer. Under the direction of George Hemingway,
Rex began manufacturing its own engines.
1912-1916 Various models were produced with many being built in the Rex
works but sold by the Premier
Motor Co of Birmingham. Gradually the range shrank and by 1916 only
chain-driven, three-speed V-twins were produced. All production then stopped
1920 A three model range appeared consisting of two 4hp singles and a 8hp
V-twin - all with three speeds and chain-cum-belt transmission.
1921 The Rex company joined forces with Acme
and then became Rex-Acme.
Note: Made the first telescopic forks in 1906, and several other
innovations including rotary-valve engines and, in 1908, were the first
to angle the top tube downward to lower the riding position.
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