The Bonhams auction consists of several highly sought-after examples, particularly pre-war models.
Each motorcycle in the collection is in running condition and is being offered without reserve.
BMW produced the R57 for only a few years after BMW’s first motorcycle, the R32 in 1923.
The R57 isn’t just rare, it is also “superbly engineered, beautifully styled and a capable rider”, says Mathieu Guyot-Sionnest, Bonhams Head of US Motorcycles.
It is estimated to fetch up to $US70,000 (almost A100,000).
“This will be our third year in partnership with the most prestigious motorcycle museum in the world and the largest vintage motorcycle celebration,”he says.
“With thousands of international motoring aficionados gathered together for the weekend event, there’s just no better venue.”
There is also a a 1957 R26 with sidecar that was the German army’s famed war workhorse and was built with BMW’s first hydraulically damped telescopic forks.