Originally Posted by
DaveSSS
Yes, that's what we're saying. Silca heads never press the top nut down. Any head that does that defeats the whole purpose of using presta valve stems. I recently bought a hirame pump head. Pricey, but really nice. It's got an easy to push lever to clamp it to the stem. The collar adjusts to difference stem diameter. Some valve stems for tubeless have a no-thread small diameter right at the top.
https://www.amazon.com/KUWAHARA-HIRA...31473976&psc=1
Not to further derail the thread, but +1 for the Hirame pump head. It's the best, Jerry. THE BEST!!