Yet, somehow, some ridiculous percentage of the bicycling world ended up with a piece of junk called a Presta valve, through which they must, with annoying difficulty, inflate their tires.

Presta valves, which work fine when part of an inner tube, simply aren’t great for tubeless systems. The limited airflow makes it tough to inflate and seat a tubeless tire bead initially.

The PumpTire is a self-inflating bicycle tire, that uses the compressive effect of the tire meeting the ground to force air into the inner tube.

Magic: The Self-Inflating Bike Tire Believe it or not, I have actually read complaints from people on cycling forums where they whine about having to pump up their tires once a month.