I changed my front tyre last week and it seemed to go well, however it was just killing me into a false sense of security. I went to check tyre pressures today, ready for Malvern tomorrow, and the tyre was flatter than an anorexic supermodel. All I did when I changed the tyre was that; change a tyre. It was already set up tubeless. Closer inspection revealed that it was leaking from the valve. So I tightened it up. Now it’s leaking from the spokes! What the fudge is going on? I did don’t disturb the valve or tape when I changed the tyre.