I pulled a wheel last night at the track in the beginning of a practice Team TT. My bike and Wheelset (Jamis Sonik - AC420's) came with those serrated (if that's the proper term as opposed to flat) lock washers. I want to replace the washers even if for no other reason than to restore confidence. Should I replace them with the same style or something different (i.e flat?) to best minimize the chances of a repeat? What do the Professionals use?
Also, you may have to use a chain tensioner if you are one that produces a lot of torque and your dropouts have steel faces on them. The steel of the wheel nut and the steel of the dropout slide against each other.