I wanted to add some shine to my wheels and they suit me. How cool is it to have REAL balls for hoops? :D They were twice the price of some of the blue aluminum tire covers I originally wanted to get, but they're worth it for the novelty they offer. That's not negative, but I was surprised how great these things really were after receiving them. They're about half the size of my little Plantronic Bluetooth headset. At least I can spot them more easily with a quick glance when it's time to pump up the tires. :)