This is addressed in the article to some degree. Wheels and the frame can be made of wood. Wheels can be lined with iron or bronze plating. Ball bearings are no

This is addressed in the article to some degree. Wheels and the frame can be made of wood. Wheels can be lined with iron or bronze plating. Ball bearings are not strictly necessary. Chain can be replaced with belts or some alternative transfer mechanism. The result would not be as comfy as a road bike today, but it would be a functional vehicle.