system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:Why do cop cars have the small hub on the wheel instead of the entire rim or hubcab?
gpt
Because when you're buying a fleet of police cars, leaving the hubcaps off can:

* save you money on the overall cost of the cars
* save you money on maintenance (replacing hubcaps)
* make maintenance easier
* keep all the cars looking standard and professional (no missing or cracked hubcaps)