Tires for Towing 20k 5ver and Snow at altitude

Ridge graps, great tire in most conditions except snow. And not the best in rain but decent.
New, they’re ok. Siped they’re better but siped and heavy axle loads reduces treadlife quicker than not.
The more transverse tread pattern is not great for water evacuation and not snowflake rated (for a reason).
Ridge graps, Toyo RTs and similar tread designs are not preferable in the snow.
Terra Graps are better snow tires even not siped.