Presta valves are skinny (6mm in diameter) needle-like internal tube valves you’ll come across on pretty much all street bikes and more expensive mountain bikes. The Schrader is the normal valve you find on vehicle tires and many bicycle interior tubes. Some pumps, like this Silca Gravelero, function reversible chuck https://bookmarklinkz.com/story19663957/the-fact-about-prestashop-live-chat-support-that-no-one-is-suggesting