Originally Posted by
dglevy
...Interesting that CST is using identical lettering. It may well be that Conti has contracted out some of the mfr to CST. Do the CSTs have removable valve cores, like the Contis?...
Nope, at least not the CST tubes I have. The core is not removable. At least it's not designed for a core removal tool. It might be possible to remove the core using pliers, or to file the threads flat to accommodate a core tool. I might try that on an old CST tube that's been patched too many times. (I tend to reuse tubes until they have about half a dozen patches.)