I have a couple of bikes running tubeless setups and I’ve noticed an odd issue. When I try to top up the tyre pressure using a portable inflator, the inflator cuts out early, leaving the tyre several PSI below the target pressure. To work around it, I have to set the inflator higher than the pressure I actually want. I also struggle to get accurate pressure readings using a separate tyre pressure gauge.
What’s strange is that if I completely deflate the tyre, remove the valve core to inspect it (it’s clean and not clogged with sealant), reinstall it, and then inflate the tyre again, it reaches the correct pressure without any issue using the exact same setting.
On a bike running standard inner tubes, the pump works perfectly fine, so it seems to be something specifically related to the tubeless setup.
Any feedback or suggestions would be appreciated.
partially blocked valve leading to high pressures to get air in?
