Originally Posted by
dsaul
I have set up two sets of the Hunt 4 season wheels with the valves that come with them and haven't had any problems with leaks. Tubeless valve stems need to be really tight to seal properly. I push on the rubber part with my thumb, while tightening the nut, and then rock the stem back and forth a bit and tighten some more. The process leaves me with an indentation on my thumb from pressing on the valve.
This, along with wider tape, seems to have done the trick. I was spoiled by my HED rims, which seal up almost air tight without sealant, without having to really crank on the stem nut, and with 21mm tape in a 21mm internal width rim. With the 20mm Hunt rim, I had been using 21mm tape, which was too narrow. I pressed in 25mm tape and that helped a lot, although I was still losing more air than I would have with the HED rims. But 60ml orange seal seems to have filled the last gaps.