I have a Vision R30 Metro CLWB, just bought some new tires, Primo Comets. but now the rear tire rubs against the brake bridge and the bottom of the brake. I have the rear tire pulled as tight as I cant get it, the bike has vertical drops out so there really isn't much room to work with in moving the rear axle. Is it possible to file a little on the drop out, or is there another way that I haven't thought of yet. if I file, where on the the drop out should I file.