Exactly why but the stability is completely sufficient, why me that is not enough to deduct a star. Fully loaded the rim wobbles like to stand slightly back and forth; it supported or jostled he might also fall. But for something he is not even thinking ...
Kept the wheels for sure and without risk of damage. And: The assembly and disassembly could not be simpler.
A premium product is the rim stand certainly not, but who expected an earthquake-resistant construction in mind, in what price range we move here should ;-)
I would at least any time buy me such a rim tree. It is very cheap and fulfills his duty to 100% - 100% is the star!