Why Are Presta Valve Cores Removable? Distant Rain Clouds Some of what I saw on the ride --- https://youtu.be/OBAn1dGzgOQ No route change today. Since it is Tuesday the route goes south and east on what I call Atascocita - Walden - Spanish Cove Drive. This would be the 21st ride on this route in 2023, probably the route I ride most often. I didn't start as early as I wanted rolling away at 9:24 AM. After the recent number of flats I decided to air my tires to 80 psi instead of 70 psi to see if that helps. Today's bike was the Cervelo Caledonia. The front tire has a removable Presta valve core and my pump screws onto the valve stem. After airing up the tube when I unscrewed the air chuck it ... continue reading at https://www.texbiker.net/blog/2023/09/05/why-are-presta-valve-cores-removable-distant-rain-clouds/