Swingarm (English Wikipedia)

Kruger, Ralf (2012-01-16). "Outstanding German two-strokes we shouldn't forget: Part Four, the 1950s". Ed Youngblood's MotoHistory – Ed Youngblood's News & Views – January 2012 Archive. Inverness, FL USA. 5th article down. Archived from the original on 2012-05-16. Retrieved 2012-02-26. This enabled the longish exhaust pipe to double as a single-sided swing arm for the rear wheel!

suspact.com (Global: low place; English: low place)

"Sprint ST | Triumph Motorcycles". www.triumphmotorcycles.co.uk. Archived from the original on 2010-06-23.

Kruger, Ralf (2012-01-16). "Outstanding German two-strokes we shouldn't forget: Part Four, the 1950s". Ed Youngblood's MotoHistory – Ed Youngblood's News & Views – January 2012 Archive. Inverness, FL USA. 5th article down. Archived from the original on 2012-05-16. Retrieved 2012-02-26. This enabled the longish exhaust pipe to double as a single-sided swing arm for the rear wheel!
"Sprint ST | Triumph Motorcycles". www.triumphmotorcycles.co.uk. Archived from the original on 2010-06-23.