4 ms·correct, it is a steel framed bike, covered with concrete - not a concrete bike.by ejb999 4y agocorrect, it is a steel framed bike, covered with concrete - not a concrete bike.ant6n 4y agoIt’s steel reinforced concrete. That’s how houses out of concrete are built as well.tiborsaas 4y agoSince most practical uses of concrete uses some kind of reinforcement this is still a concrete bike.