I'm running a 50mm Ultrabrite as the front tire on my Moots Routt 45 for routes with a high percentage of gravel. Haven't put it through its paces completely. But pretty cushy ride on descents in the Virginia Piedmont so far. A fair bit of friction on pavement. Definitely an off-road tire.
I only have about 300 miles on these G One Ultrabites and so far they meet expectations. They clobber gravel, hang in the soft and hard dirt and roll fine on short asphalt blasts. They stay planted in turns and are a fair value for the price. My workout bike has grip and control now. I stick with what works for me on my 3 bikes and for the past decade Schwabï¿½s have not let me down. 40:years cycling and yes Iï¿½ve run many other brands. Hope this helps a bit.