Sebo C series castor wheel

We had to have a new one after the vacuum bounced down the stairs. I took the entire case apart to replace the rear wheel only to find out that was not necessary. The wheels snap onto a metal post that is screwed onto the case. I pried the metal stud out of the wheel after removing it then snapped the new wheel in place and reattached the stud. It should be possible to replace the wheel without removing the stud.