@Ram1500sport313 , I note that you're running a fairly large wheel on standard diameter tires, so you don't have a lot of sidewall compared to stock setup. Sidewall is a big component of how stiff/flexible your ride will be. Less sidewall = stiffer ride. So there's that.
As far as your pressures. there seem to be two different groups of Rams. One has front and rear pressures set the same on the placard on your door frame. Mine is like this, 39 psi front and back with the stock tire size. Then there is the group with higher front tire pressure than rear. The Rebels fall in this category (55 front, 45 rear). I suspect that is to compensate for their more variable suspension and larger sidewall tires, but I could be wrong. It's also true that truck front tires carry more weight than the rear when the truck is unloaded, however that doesn't seem to factor into the first groups tire pressure, so perhaps that's not a big influence.
So, first I'd check your placard and see if you are in group 1 or group 2. If group 1, I'd set both your tires the same pressure. What that pressure should be, is really up to you. You might use the tire pressure calculator I use (see my post #5 in this thread). You could go lower since you probably aren't carrying any load (the placard pressures assume you are carrying full load). But you also don't want to lower too much since you have lower-profile tires that will be less tolerant of low pressures before it starts affecting wear negatively, especially if they're very wide.
So, that's just my thoughts. In the end it's up to you to experiment and see what works best for you.
