The assembly I now found not easy, especially for the final leg of the pull-up (the last centimeters) I have spent a lot of power - perhaps there is a trick or lube for this purpose. It is not the first tire I've assembled, this seemed a little tricky to me.
On the role of coach - rubber tracks from old tires as much as possible away:
I am delighted: absolutely no squeaks, now I hear only the chain! And somehow kicking seems now clear round as nothing more easily slips. Since the training is even more fun. And as you can see how little noise actually comes from the Trainers. As annoying nothing!
Conclusion: Buy recommendation! The money has been worth it, I did not believe it. Only I do now clearly a second rear wheel, because I the De- / Re-mounting tires really want to save on the rim (change of the role of road) me.