The Cycle Museum (2), Llandrindod Wells, Radnorshire
 
The Derny motorised cycle, Cycle Museum, Llandrindod Wells, Radnorshire

The first Derny 'Entraineur or 'Bordeaux-Paris' moped, with its petrol tank mounted ahead of the handlebars, was built by Roger Derny, Paris, France, in 1938. A fleet of Dernys was maintained for the long-established 'Bordeaux-Paris' road-race and the Derny was used for many other track and road events and for endurance training.

Being a moped, the Derny had both a 98cc (6.0 cu in) Zurcher two-stroke engine and pedals on a chainring sprocket, typically with 70 teeth on the front and 11 on the rear-wheel sprocket. This combination allows for smooth acceleration and slowing.

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Rayleigh Petrol and Electric Bicycles, Cycle Museum, Llandrindod Wells, Radnorshire

The Rayleigh bicycle nearest the camera has a Mini Motor mounted above the back wheel, the roots of which can be traced to Italy in 1946 and which was adapted for bicycles in a post-war era when petrol was still in short supply.

Croydon based Trojan aquired the rights to produce the Mini Motor and the Mk 1 appeared on the British market in 1949, and continued until 1957.

The Rayleigh bicycle, furthest from the camera, was one of the first electric bicycles to appear in 1980. Ahead of its time it failed to sell in any numbers and yet remains modern-looking and very useable.

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The Ultimate Bike, Cycle Museum, Llandrindod Wells, Radnorshire

Bruce Bursford was inspired to design and build a cycle by the new technologies employed in the formula one and aerospace industries. By using prepregnated carbon weave the Ultimate Bike is four times as strong as a conventional steel tube bicycle of the same weight.

At Brooklands Museum on 23rd August 1995, Bruce Bursford pedalled the Ultimate Bike to a speed record of 207.9mph/334.6km/h on fixed rollers breaking the old record of 153mph that had stood since 1988. Tragically, in 2000, Bruce Bursford was killed while out training. He was the holder of 10 world cycling records.

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Kestrel Recumbent cycle, Cycle Museum, Llandrindod Wells, Radnorshire

Kestrel Recumbent cycle by David Richards of Heron Engineering. It has front wheel drive, some interesting steering geometry and proved to be very reliable, fast and comfortable.

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