Next problem: Manufacturing / dimensional accuracy. Even with the original with the same seller to the ordered roles schlackern the pins of the rollers; not matter sits really just so the chair does not roll properly.
What's more, these are already broken out with me after a few weeks in diecast aluminum up to the pins of the rolling ridges. It is only a matter of time until the rollers are completely loose.
My personal conclusion is therefore very clear: That was a bad buy.
