To inflate a Presta valve, you just unscrew the valve stem anti-clockwise and after that connect a pump. When the desired air force continues to be arrived at, take out the pump and screw the valve stem clockwise to guarantee it can be airtight. Some pumps, like this Silca Gravelero, https://ez-bookmarking.com/story19700595/a-simple-key-for-prestashop-addon-unveiled