We are the manufacturer of many kinds of mechanical equipment for industrial use.Now we have made a new developed no chained bicycle that has no power chain.Generally manual bicycles are trnasmit the man power by chained linkage from the power source to the ends. The chain has oiled lubricantly on it for lessen the friction against high speed cycling.Causing from oiling, it makes dirty of trouser's hoseContamination. But this linear powered bicycle never worry about it. It has no oiled chain, has only linear power line instead of it.If you are interested in this item, pls feel free to contact me.