In most cases, it is simply a bad manufacturer design and a lack of support to the clips that hold the hubcap onto the wheel. No matter what the reason, there is not much you can do about it, except to change to a different style of hub cap.
Is it easy to change wheel trims?
Installing new wheel covers, or hubcaps, on your vehicle can instantly change its appearance. Often, wheel covers can be installed without the use of any tools or even jacking up the vehicle. In some instances, you will need to remove the lug nuts from your wheels in order to install the wheel cover.
It's really easy - just look on the side of your tyre! Wheel trims are are usually measured in inches and refer to the diameter of your car's wheels (13/14/15/16 and 17 inch). To find the size of the wheel trims you require, look on the sidewall of your tyre and you will see a series of numbers.