1951 | Triumph 5 T Speed Twin

Triumph 1951 5T “Speed Twin” 498 cc OHV vertical twin frame & engine # 5T 15110

In 1936 the Triumph Cycle Co. that has been struggling for a number of years, is taken over by Jack Sangster and renamed Triumph Engineering Co. Ltd. Edward Turner becomes the new Works Manager and he immediately starts to rationalize things: he reduces the range of machines, but keeps the excellent bottom end designs of the Page designed singles.

The “Tiger” range is introduced in September 1936 for the 1937 model year. There are three models: the 250 cc T 70, the 350 cc T80 and the 500 cc T 90. Apart from the bottom ends, everything is new. There is a new, compact gearbox and a new, enclosed valve mechanism. The brakes are improved and the oil pump is given a larger capacity. The machines has compact frames and silver and blue enameled tanks with chrome panels. Attention to styling is always a strong point with Turner: the Tigers look good and they are good and this new range of machines helps Triumph back to the top. In September 1937 the range is expanded by a revolutionary new design, the “Speed Twin”.

The press is elated: the machine is relatively light, handles and steers excellently, is very powerful and not overpriced. And it’s good looking too, in its dark red “Amaranth” color setting: the “Speed Twin “ will become the first of many successful Triumph twin models. After the war the model is further developed: it gets telescopic front forks with hydraulic damping and a sprung rear hub becomes available as an extra. The engine delivers 27hp @6300rpm at a compression ratio of 7:1. Top speed is about 150 kph and the machine weighs 165,5 kg.
This elegant and sporty Speed Twin comes with sprung rear hub and has been restored some time ago. She’s road-registered and in excellent overall condition.