4 wheel suitcases have nearly replaced 2 wheel suitcases, because they are so convenient, and easy to manoeuvre through crowds. But some of these 4 wheel suitcases can sustain wheel damage! How do you assess the wheel strength of a suitcase? Are 4 dual wheels better than 4 single wheels? Are removable suitcase wheels the answer? What is the best 4 wheel suitcase?