Best place and price for 19.5 wheels and tires.

I have a 2005 F450 crew cab dually this is the cab and chassis version that is considered a medium duty truck. The stock tires are 19.5 rims and the tires have a 14 ply sidewall. The usual tire pressure is 90 psi so yes you will feel every crack and bump in the road. I purchased my tires from a commercial truck tire store. The chain stores would sell them to you but would not mount them due to safety reasons.