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 ...

Pumping up your tires is part and parcel of riding bikes. Lose pressure and your ride is slower and less efficient But constantly having to check your tire pressure and pump up your wheels can be a ...

Anyone who rides a bike would agree that flat or low-pressure tires are a drag. But why fiddle with a pump when the tire can inflate itself? San Francisco-based startup PumpTire has invented just such ...

Discover how to make a miniature air pump for inflating a bicycle inner tube using common materials like a syringe, rubber ...