"Swap Your Bike Tires for Tennis Balls to Avoid Punctures"
A DIY enthusiast has created bicycle tires that use tennis balls as the cushioning medium instead of pneumatic tires, which are prone to punctures. The tennis balls are housed in small cut sections of plastic water pipe and bolted into a standard bicycle wheel, with a tread from a regular bike tire stretched around the outside for grip. While not offering the same quality of ride or performance as regular pneumatic bike tires, they are eye-catching and fun, and may be useful in areas with lots of nails or prickles.