In the late 19th century many bicycle industry pundits thought that drive shafts would be the bicycle power train of the future. The patent below was a way for the bevel gear of a drive shaft bike to engage a selected gear, and to change to another gear for more gearing options. This system might have been in use today had not derailluers been developed to allow a chain to be moved from gear to gear.
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Posted by: vaseem raza | September 27, 2006 at 10:24 PM