Arrow points to the cause of the failure of this Ritchey WCS freehub. This is in my opinion a flawed design and a pretty good example of an over-engineered design. The following photos show the hub side and how is is supposed to work. This failed with less than 100 miles on this new wheel. Not good. I must add that Ritchey ackowledged that there was a problem with this design and promptly said that they are sending a replacement freehub body/rebuild kit that is supposed to have been improved...We'll see. I'll post when I receive it hopefully in a couple of days.