friction drive tire brush
Hello, I kind of stumbled into this post searching for random friction drive info. I have a jc higgins bicycle with crafstman weedeater-style motor kit manufactured in the 60's and 70's just for the purpose of motorizing a bike. It mounts to the front fork and where a weedeater shaft would normally connectit has a clutch assembly with rubber-covered drive wheel. I was picking up a lot of road grip when I lived in richmond,va, so i used a metal bracket from a bicycle carrier mount. I screwed it to one of the engine support bars and to the other end of this small bracket I used two screws to attach a fingernail brush. It is easily adjustable, sits fairly unseen behind the motor just against the tire, makes no noise(at least a small enough amount that the engine drowns it out) and most importantly it removes about 99% of road grit. I attribute this more for the longevity of my drive and not as much for the tire itself. Anyway, just a small idea you might use as a foundation for your own "tire wiper".