What are the most basic factors that affect a stability of the bike? And if so is it more stable if it the value was larger or smaller(example; larger wheels more stable)

Question

Bike width(From left to right when viewing as a rider) ?
paddle height from ground?
overall height?
Bike length (from back wheel to front wheel)?
Tire width?
Tire radius?
Suspension?
Longer chain shorter chain?
The different connecting metal pipes between front and back wheels?

In: Physics

Answer 1

Probably the MOST important factor is caster. This is the angle of the axis that the front tire pivots on. Tilt it back, the bike is more stable, but harder to turn. Tilt forward, quick turning and less stability.

Think of motorcycles. Those old choppers with the front wheel stretched waaaaayyyy out in front? They’re super stable, but you need a ton of room to turn around.