I'm a new member and don't know if i'm posting this in the right area or not. My question is: We recently purchased a 33 and a half foot 2011 Heartland Big Country and I'm having some tire issues. I had several issues with the stock tires that came with the rig and need to replace tires. The manufacture calls for and supplied st235/80R-16E Power King, Tow max. These tires are crap. Any ideas on a more substational tire or will St235/85R-16 fit the rig.