It was three years ago that we first heard about inventor Benjamin Krempel's PumpTire – it was a prototype bicycle tire that used wheel motion to keep itself inflated. While it was an interesting idea ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Removing an inner tube for repair or replacement can sometimes be a real fight but with a bit of ...

Splashdown Water Park is building an attraction for adrenaline junkies. When the $500,000 ride is completed, inner-tube riders will shoot through a wide, enclosed tunnel sloping 130 feet downhill.