I have been wanting to switch to a single speed bmx style chain as I am a fat ass and have broken a few chains in my time. I dont care about shifting, but have noticed that unless the derailer is in absolutely perfect adjustment, it wont back pedal right. I believe that it is because of the tight clearance of the chain through the derailer pullys, but I am not quite sure. Im running 8 speed. Has anyone else had this problem? Is there a certian deralier that works good? Thanks!