If you travel a lot and are getting sick of the cheap hard plastic wheels that are common on most rolling luggage, then consider a Blade Bag conversion. These kits are designed to replace those noisy (click, click over tile seams), non-smooth, no bearing wheels, with the high quality wheels used on roller-blades. You can get a complete kit for around $20 and install it yourself. The next time you see a pilot roll by you in the airport, pay close attention to the wheels on his bag… they just might be BladeBag wheels since the conversion kit was designed by a commercial airline pilot. Their web site might not look overly professional, but their wheel kits are great.