Tyre loosing air pressure despite having no puncture The front tyre on my bike looses air pressure despite there being no punctures. There is no leak via the Schrader valve either. If I fill up the tyre, it looses a considerable amount of pressure by day 3. What could be causing this?
A puncture
The tire lining along the valve is faulty.
The seam in the tire is faulty somewhere around the tire.


The best way to find out is put some soap in a bucket/tray of water and cover the tire. Fill it up as much as you can and the bubbles are where the leak is!