To inflate a Presta valve, you merely unscrew the valve stem anti-clockwise then connect a pump. When the desired air strain has been achieved, eliminate the pump and screw the valve stem clockwise to ensure it is actually airtight. Some pumps, for example this Silca Gravelero, characteristic reversible chuck heads. https://iowa-bookmarks.com/story15533574/the-basic-principles-of-prestashop-addons