Dave Krafft's Retro-Direct SWB He modified the inner freewheel body on his lathe, which turned out to be a piece of cake because they no longer harden these steel bodies as they used to. He has noticed that you can't take the rear wheel off normally because the two opposing freewheels mean that both chain runs are under tension. He wants to add some kind of quick release to the reversing chain tensioner to make removal easier.