The T-valve is a chrome bolt in version that facilitates installing in many models of bikes so as to leave the sensor in place and introduce air as needed.
If there is room on a wheel, these are the best thing since sliced bread. Lots of wheels have the valve stem in center of rim and hard to get to with brake rotors in the way. Even if off center facing outward, they are a great help in getting to the valve stem.
Its best to leave the sensor on and not lose air taking off and on.
Even if you are not ready to change tires, it’s best to have a set, so when you do have a change of tires, you have them to put on for free, so to speak.
Requirement to use optional T-Valve

Required rim hole size to fit T-valve

D1 is the required hole diameter to install the T-valve. Suitable for rim valve hole of diameter 11.3mm or 8.3mm. This requires installation at a tire shop.
Price is per valve. Order 2 if you need 2.
Can be purchased in Silver ....... T valves ease air pressure adjustments without having to remove the sensors.
NOTE: This valve is for Tubeless Tire setup only, unless you have a spoke application that has been converted to Tubeless.