Serviced to separate trailers this week with the wheel nuts on back to front being incorrectly fitted as the picture demonstrates. Thought I would post this to show the incorrect way the nut is fitted. The conical part of the nut sits into the recess on the rim. If you notice this nut is fitted the wrong way round and the flat part of the nut is against the rim, this is a sure bet.. the wheel will come loose.and is dangerous. Please check your trailer to make sure yours are fitted correctly. Picture 1 is incorrectly fitted. Picture 2 the wheel nuts are fitted the correct way.