Wheeled carry-ons are great for those of us who dislike lugging anything through the airport, where we often do most of our walking. These little back-savers can vary from 16" to 22" suitcases to totes, laptop cases or even backpacks, all on wheels. One of the lightest weight full-size carry-ons is the Rick Steves model, which weighs in at only 7 lbs!