Theres a homeless guy around neighborhood that built a gas one w/ a a single wheel that gets him & all the junk he collects movin pretty good..the only complaint hes got is that if the wheel gets bouncing its sometimes hard to get back undercontrol...dunno if this helps...Ill take a pic next time I see him & post it here. its not really a "Trailer" more of a single golf cart wheel w/ a platform for an engine above it & an arm for attatching to his bike.