Hi REI/Community -

I purchased a wheeled REI luggage bag back in 2012. I am not sure the model name (I can't find it on the website), so I attached a photo. The tread on the wheels have recently come off and I want to replace the wheels. I read elsewhere in the community postings that REI does not carry replacement wheels, but that other retailers have various sizes of wheels that would work as replacements. The problem is that I have been unable to remove the existing wheels. The bolt holding the wheel just turns. I unzipped the inside of the bag to find the nut to hold so the bolt could be removed, but the entire wheel section is covered in a plastic casing. Am I just out of luck or can these wheels be replaced? Any suggestions?