Rubber tires does not generate grip through simple static friction. They stick to the road in two different ways, adhesion and deformation. The adhesion is weak

Rubber tires does not generate grip through simple static friction. They stick to the road in two different ways, adhesion and deformation. The adhesion is weak molecular forces that stick the rubber to the road like sticky tape, a larger area will have more adhesion. The deformation deforms the tire to follow the surface and dig into it. Because rubber is viscoelastic, the force is greater on the lagging side of a bumb when the tire is slipping. The adhesion is greatest in the front of the contact patch where there is less slip and a wide tire has a wider but shorter contact patch, so it has more grip from adhesion. If you keep the pressure in two tires the same, a wider tire will have the same contact patch area as a narrow tire since they will carry the same force and force is pressure multiplied with the area.