Ever stomp on the pedals just to have your rear wheel slide forward in the dropouts and throw your chain we haveusing all kinds of hubs in all kinds of frames there are lots of bmx style tensioners out there but few of them fit in our dropouts without some serious grinding so we decided to design a chain tensioner that will keep that rear wheel static in our dropoutsand most other kinds of rear facing horizontal dropouts plus ours will open up a bottle o39 brew the body of the