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the bike evolves to your riding style.
This
In the words of Flann o'Briens Sergeant Pluck:
Be warned. Never allow your bicycle to live in close quarters with humans, because their atoms might get mixed up.
People who spend most of their lives riding iron bicycles . . . get their personalities mixed up with the personalities of the bicycle as a result of interchanging of the atoms of each of them and you would be surprised at the number of people in these parts who nearly are half people and half bicycles
Dude, you cant just turn a bike into a rat. It has to go through an ageing process where the bike evolves to your riding style. Only then has your bike gained the rat status