The oak stair treads is used so often to build homes that think this would have become the standard material for these structures over the last century or so. If you have oak floors, probably your stairs are also made of the same wood. Recent decades have seen the introduction of multi-laminate floors solid. Made with thin layers of wood glued together, these often have a sheet of oak or other desirable species. The laminated structure makes this thin material is strong.
The oak stair treads low price is often available with veneer. Such coatings are very thin layers and must be covered with a strong finish, and transparent to minimize wear. Because the stairs to support high traffic, veneers steps may not be durable enough. This is especially true if you have kids or dogs, or if the soil is in the exterior of the house is sandy or rough.
If you have steps of oak stair treads with veneer, keep them clean for the rough material is not embedded in the finish with every stride. As soon as the bare wood starts to show through the finish, re-cover the steps with durable polyurethane material. The carpet stairs treads receive prevent the excessive wear and hide the irreparable damage to the thin veneer.