Add Yahoo as a preferred source to see more of our stories on Google. There aren't many technologies as ubiquitous in cycling as the Presta air valve. So it's surprising that, in the roughly 100 years ...

We’ve all seen a bushel of articles on repairing a tire puncture: clean out the puncture, plug it (with maybe more than one plug), and then fill it back up with air. However, what if you damage or ...