Brian Stonebridge was a leading British

United Kingdom

The United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...

 motorcycle

Motorcycle

A motorcycle is a single-track, two-wheeled motor vehicle. Motorcycles vary considerably depending on the task for which they are designed, such as long distance travel, navigating congested urban traffic, cruising, sport and racing, or off-road conditions.Motorcycles are one of the most...

 racer of the 1950s competing in scrambles, now known as motocross

Motocross

Motocross is a form of motorcycle sport or all-terrain vehicle racing held on enclosed off road circuits. It evolved from trials, and was called scrambles, and later motocross, combining the French moto with cross-country...

.

Stonebridge began riding for the Matchless

Matchless

Matchless is one of the oldest marques of British motorcycles, manufactured in Plumstead, London, between 1899 and 1966. A wide range of models was produced under the Matchless name, ranging from small two-strokes to 750 cc four-stroke twins...

 scrambles team in 1950, winning a gold medal in that year's International Six Days Trial

International Six Days Enduro

The International Six Days Enduro is the oldest 'off road' motorcycle event on the FIM Calendar.The ISDE was first held in 1913 at Carlisle, England. It has occurred annually, apart from interruptions due to World War I and World War II, at various locations throughout the world. The early...

. In 1952 and 1954, he was a member of the British teams that won the Motocross des Nations

Motocross des Nations

The Motocross des Nations is an annual team motocross race, where riders representing their country meet at what is billed as the "Olympics of Motocross"...

. In 1954, he joined the BSA

Birmingham Small Arms Company

This article is not about Gamo subsidiary BSA Guns Limited of Armoury Road, Small Heath, Birmingham B11 2PP or BSA Company or its successors....

 factory team, helping develop the two-stroke, BSA Bantam

BSA Bantam

The BSA Bantam is a two-stroke unit construction motorcycle that was produced by the Birmingham Small Arms Company from 1948 until 1971...

 scrambler. Stonebridge then moved to the Greeves

Greeves (motorcycles)

Greeves Motorcycles Ltd is a British motorcycle manufacturer producing motorcycles mainly for the trials and off-road market. Owner Richard Deal bought the rights to the Greeves name in May 1999. The original company had been producing motorcycles since 1952, funded by a contract with the...

 racing team in 1957, becoming the company Competitions Manager and Development Engineer. He competed in the 1959 F.I.M.

Fédération Internationale de Motocyclisme

The Fédération Internationale de Motocyclisme is the governing body of motorcycle racing. It represents 103 national motorcycle federations that are divided into six regional continental unions....

 250cc European Motocross Championship, finishing the year in second place behind Rolf Tibblin

Rolf Tibblin

Rolf Tibblin is a former world champion motocross racer. He was one of the top riders in the Motocross Grand Prix World Championships during the 1960s...

. Stonebridge was killed in a road accident in October 1959.