You could place a larger tyre on the front of the bike but it would irreversibly upset its Feng shui. The Qi which is the movable positive or negative life force which plays an essential role will be reversed. The internal or physical energy of qi as it relates to feng shui would include the orientation of a structure, its age, and its interaction with the surrounding environment including the local micro climates, the slope of the land, vegetation, and soil quality.
The five elements of feng shui (water, wood, fire, earth/soil, metal not forgetting rubber) are made of yin and yang in precise amounts (Greater wood has less yin than lesser wood, but not as much yin as water, and so forth). Earth is a buffer, or an equilibrium achieved when the polarities cancel each other.
If you ride a motorbike its the other way round.