I have purchased 4 sets of replacement wheels and am not sure what the difference is between the replacements and the original wheels. I am an airline pilot and use my suitcase at least 20 days a month. The wheels that originally came with my suitcase held up for 6 years and thousands of miles. The new replacement ones last 1 week and start to come apart. I’m the last 2 months, I have had to replace the wheels 3 times! Something is definitely not right with the replacement wheels. The new wheels, see photo, I put on 4 days ago and have used all 4 days and they are once again falling apart and making that same grinding noise. Very disappointed in the quality or lack there of, of these replacement wheels.