Update: This Instructable was featured on lifehacker.com! Visit the article here.
The wheel on my favorite carry-on bag had a chunk come off of it one one trip and it wasn't too many trips later that the plastic part of the wheel came off completely, leaving behind the little metal core that housed the bearings. This left me scraping through the terminal and carrying the bag through anyone's house as to not leave a trail of scrape marks behind me. Other than the wheel the bag was in fine shape so I hated to throw the thing away. Here's what I did to repair it. You can see this repair and more than 300 others at my website at ShareYourRepair.com