I've tried many brands of chain and it seems they all stretch some more than others. I'm running some high end EK chain on the primaries of my tracked IV right now. They advertise no stretch. Well after the initial 20 hours they needed adjusting. Hoping they'll last longer than the others I've tried. Once they stretch out of adjustment I toss them as a stretched chain will wear the t20 sprockets faster. I'll report back on these chains in the spring after a hard winter pulling fish houses in the snow.
What it lacks in ground clearance it makes up for with traction.