Reeseman44

As the title states, I'm looking for recommendations for a good stiff sidewall tires for towing our toyhauler with a golf cart or side by side inside. Total weight is 8k+ lb fully loaded, may get a bigger one that will be 10k lb + fully loaded. Also looking for some suspension upgrade recommendations, either helper springs, an additional leaf spring added to the pack, or airbags. Ultimate goal is stiffening the rear end to help with squat and sway. I have a 2018 seirra denali with the 6.2, the magneride suspension seems to limit the modifications options.