First the thesis: the nodder bike
Secondly the antithesis: the road bike or the bmx
Finally the synthesis: the fixed wheel bike.
An alternative dialectic proposed by Marx viewed the thesis as the pedestrian stage, the antithesis, the motor car and the synthesis the bicycle. This latter view ingnored the subtle differences within the classes of cyclists and fell apart in internectine squabbles with Trotskyists who believed in the universal and perpetual revolution that is fixed wheel cycling (that is apart from the WRP who believed whatever they felt that other people didn't believe.)
I must say that is very good