I am not running 19.5 but Nitto Dura Grapplers 285/75-17 rated at 3970# each. (Highway or "steer" tread)
These stay on all winter and we don't use the TC from November through April.
We live in northern N.H., lots of snow and ice.
While our truck is 4WD, I don't use any weight in the bed for winter traction.
Even on days of lower traction, I rarely use 4WD. So I get plenty of traction from the limited slip rear and highway tires.
Put a heavy TC in the bed and that would only improve.
And the tires are quieter on the highway. I will buy the same when I need to replace them.
This has made me think that what a tire looks like to the eye is not how it performs on the road (or on snow, ice or even mud). IMHO, of course.