The main theory that is used in such a type of link wheel network is that you will be able to have many different types of links. Here all the linking websites will be increased very highly which will then result in the increase in the overall page rank of your main website. The theory is that by having a network of links from a variety of high ranking sites, this will ultimately improve the position page rank of your site. If you are deciding to choose such a type of link wheel structure, what you have to remember is that it is very essential that continue the overall process of building your link wheel. It is best that you have as many levels of the link wheel as possible as this is what is effectively going to result in the increase in the number of backlinks that you have. Such a type of link building is a continuous ongoing work as after a small period of time, you can be sure that your main website will be able to well rank very highly in any search engine.