Presta valves are skinny (6mm in diameter) needle-like interior tube valves you’ll discover on essentially all street bikes and costlier mountain bikes. The Schrader is the traditional valve you find on automobile tires and many bicycle interior tubes. You can install a Presta valve on a rim suitable for Schrader, https://fellowfavorite.com/story20965288/prestashop-plugins-no-further-a-mystery