4-Speed Moulton TSR Prototype

A prototype 4-speed TSR was shown at Bradford on Avon on saturday, as part of the annual Moulton Bicycle Club event.

The gearing combines a Schlumpf Speed Drive and Fichtel & Sachs Duomatic. This means that gear-shifting and rear braking is done without cables, allowing the bike to be separated, without the need for cable splitters.

Gear changes for both Speed-drive and Duomatic are activated by the feet. Gear change in the Duomatic is effected by pedalling backwards about 1/4 turn. Changing gears on the speed-drive is done by tapping a button on the pedal crank with the heel.

The Fichtel & Sachs Duomatic contains a coaster brake, activated by back-pedalling.

The 4-speed TSR was visually stunning. The bright white paintjob contrasted beautifully with the new Moulton Bicycle Company headbadge, and a Union Jack on the seat tube. It was very similar to Team GB's Olympic colours.

The new headbadge, which will adorn all Moultons in future, depicts a cyclist on a Moulton (probably a TSR) infront of The Hall. Colours are traditional AM Red, with the new blue, on a shiny silver background. A Union Jack silhouette appears underneath, along with the words "Made in England".

The prototype also sported Moustache-style handlebars, and a reverse-action brake lever to operate the front brake.

The Sachs Duomatic has been out of production for many years, but a large number of "New Old Stock" seems to be available from various sources.

4 thoughts on “4-Speed Moulton TSR Prototype”

  1. Thanks for this Patrick. Did they explain the ‘mission profile’ of this bicycle? i.e what’s it for?

  2. My NS with Duomatic and Speedrive is probably the “father” of this new baby. Never thought about it´s “mission profile” when riding it. It´s just beautiful.

    /Users/franzmanola/Desktop/NS F.Manola.JPG

  3. Hi,

    Do you have any info on how well the speedrive combines with a duomatic?
    I am planning a bike with this transmission, but I am concernd that it will be inefficient, due to planetary gears in the cranks and the back wheel.
    Franz, could you relate your experiences with your NS?

    Thanks,

    John

  4. I must have this stem/bar combination on my TSR – does anyone know whence they came?

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