Bicycle Pump Not Pumping. Then whenever i tried to put the pump thing on the tire thing the tire thing would go down within the tire so. Foot pumps are not specifically designed for bikes but can serve the purpose on large mountain bike s low pressure tires with schrader valves.
How to troubleshoot a bicycle pump step 1. The pressure inside the tire keeps the valve sealed until you break the seal by unscrewed and depressing the tip. Fit the pump head onto the valve.
Both systems serve to keep the head in place as you start pumping.
When you start pumping. Make sure to brace the pump with your hand wrapped around the spokes or tyre to avoid transferring too much of the pumping force to the valve which could lead to damage. We both checked his mini pump by holding our hand over the head and making sure pumping created pressure. Then whenever i tried to put the pump thing on the tire thing the tire thing would go down within the tire so.