Joined: May 2008
Posts: 10,106
Likes: 2,758
From: Fredericksburg, Va
Bikes: ? Proteous, '65 Frejus TDF, '73 Bottecchia Giro d'Italia, '83 Colnago Superissimo, '84 Trek 610, '84 Trek 760, '88 Pinarello Veneto, '88 De Rosa Pro, '89 Pinarello Montello, 'Litespeed Catalyst'94 Burley Duet, 97 Specialized RockHopper, 2010 Langster
Castings don't have much if any elongation, drawn or extruded AL will deform, such as handle bars when they are bent to the shape we enjoy the most, drop bars. Same is true with steel but there aren't very many parts on a bike that are cast with the exception of lugs which use to be formed from sheet metal that does have some elasticity.