i had a xt hub and the cones were propa loose, i went to do a drop(about 5ft) onto concrete and the wheel locked against one the pads and the frame, which resulted in a fat old nose dive which smashed my face up a bit and worste thing of all in was it was in mid summer down the beach, so there were plenty of people to laugh at me...and i snapped my stem before landing a little drop.(crap stem)