A link wheel is a link scheme; these schemes are frowned upon by google. At best, they're not going to help you much because the most reputable and authoritative sites do not engage in such schemes. At worst, they could get your site penalized by google. It's best to just keep away from these sorts of schemes. Instead, link generously to the most relevant and useful sites. Make your site link-worthy, and put yourself out there, engaging in conversation and networking with other webmasters. Your site will speak for itself if it's good and you won't need to rely on link schemes like this. If you want to directly add links from reputable sites, do so by creating something of value, like writing articles as guest posts or on high-quality article directories, or by creating a blog that feeds into your site. Good luck!