stackyFACTS
Transport

Presta valves rely on internal air pressure

HERE’S THE INTERESTING PART

Because springs are for amateurs, the Presta valve demands that the very air trying to escape is what forces the valve shut. It’s a beautifully cynical piece of engineering where the pressure of the captive air itself secures its own prison, completely eliminating the need for complex internal parts.

Presta valves rely on internal air pressure
STACKY / Transport
One discovery leads to another.

Keep exploring facts in this topic.

Transport →
STACKY FOR IPHONE

A bigger world.
One discovery
at a time.

Keep discovering with Stacky. Interesting facts in an app that is always within reach.

Download on the App Store
ONE MORE DISCOVERY?

Keep exploring

All in this topic →
Car tires are actually black entirely by design, as the natural color of vulcanized rubber is a rather unappealing milky white.
Transport

Car tires are actually black entirely by design, as the natural color of vulcanized rubber is a rather unappealing milky white.

Car tires are actually black entirely by design, as the natural color of vulcanized rubber is a rather unappealing milky white. Early automobiles rolled…

Discover more
Why spare tires are so small and bald
Transport

Why spare tires are so small and bald

Those tiny donut spares buried in your trunk are designed to look and feel awkward so you do not leave them on forever. They are the automotive equivalent of…

Discover more
Semi-trucks use dual tires for heavy loads
Transport

Semi-trucks use dual tires for heavy loads

Because popping one tire with 40,000 pounds of freight on its back is a catastrophe waiting to happen. Pairing tires side-by-side on each axle provides a…

Discover more
Rubber tires on standard cars and trucks are actually one of the absolute largest sources of microplastic pollution in the entire world.
Transport

Rubber tires on standard cars and trucks are actually one of the absolute largest sources of microplastic pollution in the entire world.

Rubber tires on standard cars and trucks are actually one of the absolute largest sources of microplastic pollution in the entire world. Every single time a…

Discover more
Semi-truck mud flaps intercept road debris
Transport

Semi-truck mud flaps intercept road debris

Those giant rubber mats hanging behind truck tires aren't decorative flaps. They are critical defensive barriers intercepting the continuous storm of water,…

Discover more
Engineering miracle of modern car tires
Transport

Engineering miracle of modern car tires

Your tires are the only thing keeping your heavy metal box safely on the road at high speeds. Modern rubber compounds are mixed with silica to provide insane…

Discover more
StackyMore discoveries in the app
Download on the App Store