Did the Duncan get there first?

It’s always great to receive Old Bike Mart. It’s very good reading, well done!

Regarding the Swinging Arm Suspension Debate, we can better all your readers with our 1920 Duncan which has a swinging arm suspension with air-controlled dampers unit. It is very similar to the Velocette Mk8 which was introduced in 1939.

The Duncan motorcycle was made at Brooklands and on a recent refurbishment on site, the Duncan workshop signs were found in their original positions! We have a complete folder full to bursting with photos and info, some of which are attached.

The pre-restoration Duncan, which was mentioned in our A-Z of British Motorcycles recently, was built by John Oswald Duncan, an aircraft engineer working at Brooklands.

Sammy Miller with the restored Duncan which now resides in his museum.

A closer look at the remarkably modern suspension relying on compressed air.