I can't speak for Delsey, but I've brought along a Samsonite and a Rimowa for many trips in exactly the same locations you are hitting up (and then worse ones too) - and the wheels have held up very well.
Over uneven cobblestoned roads, pot holes, up and down stairs (when it's too heavy or I'm too tired, I can't be bothered to carry them so just drag them up or down) - it's been many years, and apart from getting dirty, the wheels have never given me any issues.
If you are carrying more than 1 luggage, two spinners are much easier to use than 2 rollers.