ZZR-Romet 4.351.4.007
Main Photo
Category:  Rear Derailleurs
Name:  ZZR-Romet 4.351.4.007
Brand:  ZZR-Romet
Model:  4.351.4.007
Years:  Mid 1960's - Early 1970's
Weight:  241 grams (avg)
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Added By: groman on 11/08/19
Updated By: groman on 11/08/19
Additional Photos - click for full size
ZZR-Romet 4.351.4.007ZZR-Romet 4.351.4.007ZZR-Romet 4.351.4.007ZZR-Romet 4.351.4.007ZZR-Romet 4.351.4.007
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Outer Plate MarkingsInner Plate Markings
MaterialSteelDesign CategoryInline parallelogram
Attachment Bolt SizeClawCable Attachment Bolt Size8mm Wrench
Shifting SystemsCable Adjuster
Cage LengthMax Cog Size
Max Chain Wrap  
General Information

The derailleur was produced by a Polish bicycle manufacturer. From 1948 to 1971 the factory was called Zjednoczone Zaklady Rowerowe (ZZR, in English United Bicycle Works) and had its headquarters in the Bydgoszcz town. The name of the factory changed over time:

1948–1971 Zjednoczone Zaklady Rowerowe (ZZR), (United Bicycle Works)
1971–1974 Zaklady Rowerowe ROMET (Bicycle Works ROMET)
1974–1991 Zaklady Rowerowe PREDOM-ROMET (Bicycle Works PREDOM-ROMET)
1991–2005 Zaklady Rowerowe ROMET Spólka Akcyjna (Bicycle Works ROMET Joint Stock Company)
In 2005, Zaklady Rowerowe ROMET Spólka Akcyjna ceased to exist.
In 2006, the ARKUS & ROMET GROUP took over the rights to the ROMET trademark.

ARKUS & ROMET GROUP still manufactures a wide range of bikes from kids to road bikes as well as mopeds, scooters and motorbikes.
The pictures show my NOS derailleur.
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WeightSourceNotesAdded By
241 GramsUnknown groman
241 GramsActual groman
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