Hello, If you have any info you would like to share regarding converting an existing bike please share. I have been interested in converting my Motobecane Boris medium frame fat bike for awhile now. I joined Endless Sphere to ask a few questions and they seem to be a stuck up crowd over there and not really reply. I do plan on converting my Boris at some point when money allows. The BBSHD system looks good. I tried to ask a few vendors some questions only to have them reply back with I should know what I'm doing on my own before attempting anything and didn't really answer my questions at all.