Originally Posted By polyspheric
To interpret comparisons between different bars: the "stiffness" (resistance to wheel travel) is definitely not linear.
It's much closer to proportionate to the 4th power (^4) of the actual diameter, so subtracting .010" for paint etc. may be useful. Here are some common sizes with .010" deducted. To compare for the rate, divide the right column numbers. E.g., a .940" bar is about 43% stiffer than an .860" bar, etc. This suggests that even a single interval swap (.900" to .920") may help.
.860": .522
.880": .573
.900": .627
.920": .686
.940": .748
.960": .815
.980": .885
1.000": .961
1.020": 1.041
1.040": 1.126



Without sugar coating:
1. you are stating the obvious
2. Op asked what he should use, not if a larger size would "help"
3. There are numerous threads in the Handling forum here that have pretty well supported the agonizing slow awareness/consenus that our mopars have been undersprung for decades, and a single step increase from OEM on a TB, without reason, is just plane wasting money

Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.