Replace the wheels on your luggage instead of buying new luggage. You can replace the wheels in many models. This is simple to do and will save you money. However, not all suitcases have wheels that can be replaced by the owner, and some will have to be taken to a repair shop to be fixed.
Take the old wheels with you before you purchase the new wheels. Time can be saved if the correct wheel size is purchased. If buying online, measure the wheels and make sure they are the same size and type as those you are replacing.
Test out your new wheels. Make sure they are not wobbly or on crooked, as this could affect the way your luggage or suitcase moves.