After a long think I have but then decided to go for this spoke reflectors. Decisive for this has been that I have not found a clever, white rim reflectors (American style), who sat firmly on the spokes. It was definitely the right decision. As already mentioned in other reviews, it involves the spoke reflectors manufactured by 3M. In the packaging two Secu clips were with the corresponding inspection number, for each wheel a. Thus, the directive is also nothing in the way. Even if that were not printed, the security is much better than with burlap and cat's eyes. Furthermore, 72 pieces more than enough, I even still 6 left. Theoretically a Secu clip would be enough to every other spoke. When driving, it seems then still consistently as a strip. And I know plenty of people who have done so and also during an inspection, there were never problems.
It remains entirely up if he installs a Secu Clip on each spoke. I have at least done it on my mountain bike and these do not interfere with the path. Selbt for a road use with a lot of mud they were very easy to clean. Scrub with a sponge but you should refrain as possible, because then you rub the reflection layer. Use best Spülimittel or Autoschampoo.
My conclusion: a great thing this Secu clip. I do not want to miss more and for a mountain bike exactly the right decision.