Hi guys, sorry for such a dumb question but I cannot find any info on this.
I need to pump my tires up on my bike. I am no bike expert but I know that they are schrader valves and I am using a small hand pump. "Blackburn Mountain Air". It supports both schrader and Presta valves.
Problem is I can't get an air tight lock on. I've never dealt with schrader valves so while fooling around with it I realized pushing the pin in released all the air and now one tire is completely flat :\
I've had this pump for ages and lost the instructions a long time ago and have never needed to use it till now.
Hope someone can help.