Used GM pulley systems may be the cheapest way to go, but if you have a few extra bucks in the budget then this Raven S-Drive system from Eddie Motorsports will look a whole lot better and give ...

Chainless Bicycle Uses Wire and Pulley System, Eliminating Grease and Increasing Cool Factor. Meet the Stringbike. By Rebecca Boyle. Published Sep 20, 2010 8:36 PM EDT.