If you're rushing to catch a plane or pulling your suitcase up and down stairs and over uneven terrain, the 2-wheel design is a better option. The suitcase tends to be lighter with larger, sturdier, protected wheels that are recessed and don't protrude, providing a better fit in the overhead bin of the airplane.

The choice between single and double wheels (often called spinner wheels) depends on your travel environment and durability needs. Double wheels (eight wheels in total) are generally considered superior for stability and weight distribution. Because each corner has two contact points, the luggage is less likely to tip over, and the weight of a heavy suitcase is spread over a larger surface area, making it feel lighter and glide more smoothly on flat, polished airport floors. They are also less likely to get stuck in small cracks or gaps in the pavement. However, single wheels (four wheels total) are often larger and more rugged, which makes them better suited for uneven terrain like cobblestones, thick carpets, or cracked sidewalks. High-quality single wheels, like those found on premium brands, often use ball bearings that provide a very smooth roll. Ultimately, for most modern travelers who spend the majority of their time in airports and hotels, double wheels offer a more effortless, "360-degree" maneuverability that is hard to beat for convenience and balance.