Both Eibar in Spain and St. Etienne in France were major arms manufacruring areas that moved into bicycle and components manufacture fairly early so I am pretty sure that many more names could be found of arms makers who produced bikes or components. IIRC one of the early derailleurs was made by a French gun maker in St. Etienne.
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Gear Hubs Owned: Rohloff disc brake, SRAM iM9 disc brake, SRAM P5 freewheel, Sachs Torpedo 3 speed freewheel, NuVinci CVT, Shimano Alfine SG S-501, Sturmey Archer S5-2 Alloy. Other: 83 Colnago Super Record, Univega Via De Oro
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