Surfing rock gardens sans bike is exhilarating. It's also pretty rough on shoe soles. If you're lucky enough to ride Sidi Dragons, you can replace the tread parts with a few clicks of the mouse and a Phillips screwdriver. Each shoe has four replaceable sections, and the Sidi Dragon SRS Sole Replacement System comes with these eight tread parts four per shoe and enough screws to replace everything. You can swap out everything at once, or do it as necessary. Please note: these are not compatible with the Dragon II Carbon sole.