Review on Supacaz Valve Extenderz Slick VE 01 by Brandon Teitel

The bottom of the extension is threaded like normal valve extensions but the top is not. So you can't fit a presta valve on top, but you can on the bottom? In any case, there's no practical way to use them with tubulars. A complete waste of money. I even tried forcing the extensions into my valve and it didn't even come close. Both sides tried, no bones. What the hell were they thinking? The only other thing I can think of is that they are copyrighted for Supacaz valving and tubeless/tubular setups.