Originally Posted by
Darth Lefty
I actually wonder why cheaper bikes are still made of steel and aluminum, and not injection molded FRP, either with fiberglass or carbon fiber. Lots of other things are.
I'm not sure pure plastic will be widely accepted by the bike community, although more and more plastic is slowly creeping into our bikes.
There also seems to be a mentality of a frame that will last forever, built up with disposable parts.
Also, strength, flex, and fatigue, thus carbon fiber reinforced plastics for better structural properties.