Manufactured 1921-1929
Heros Motorrad Motoren & Getriebebau of Oberoderwitz, Saxony, built auxiliary bicycle engines and single-cylinder sidevalve engines of 155cc to 247cc, 1921-1929.
These engines were supplied to other manufacturers including Ranzani in Italy.
Originally named H&R (Motorenwerk Zittau, Hartmann & Richter, Niederoderwitz), the firm also built the Ares brand.
Sources: Tragatsch p169, de.wikipedia.org
For other manufacturers using the Heros marque see Disambiguation
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