Never saw a need for UHD tubes. If a thorn or a nail goes through the tire carcass, it's going to go through the tube. Buy two name brand standard weight tubes for the price of one UHD and put the other in your panniers.
I'd be unstoppable if not for Law Enforcement and Physics !
Inside every older person is a younger person wondering what the hell happened !
Ridden so many bikes I lost count ! ! !