This locking nuts are in my opinion the standard equipment and not to the accessories program. How useful a Bike rack for 3 wheels and only one can be sichern- great. On the quality there is nothing to complain about. Installation could not be done easily and quickly. I can not judge whether they withstand an attempted theft long, at least they will aggravate these. So Thule, from hence in the standard equipment and prefer 10 euro drauf beat!
