Very late to this conversation but I just had the Rough Country 2" kit installed last week. Looks great but I have the same hard bang on certain speed bumps. Tire size is 235/65R17 (Toyo A/T Open Country).
Question: Even with the extended strut from Rough Country's front spacers, would switching to a brand new Monroe front strut assembly potentially solve the hard bump?
Photos taken pre-alignment & camber adjustment by a good 4x4 shop.
An aside: After the RC install, I separately made two trips to Firestone Complete Auto for alignment. Wheels were aligned, but there was positive camber on the front end (wheels tipped out at the top) and they couldn't figure out how to get to neutral so I wouldn't burn my outer tread at a rapid rate.
You can see the front wheel tipped out at top. Camber bolt adjustment fixed it.
Since they don't specialize in lifted vehicle alignments, they didn't know what to do with the camber bolts that came with the kit and were installed on the front strut knuckles.
New camber bolt (Rough Country) is the shiny black one at top of the knuckle.
Took it to an off-road shop that deals and installs a lot of Rough Country kits, and he straighten out the toe for me like an expert. He also commented that he liked the new kit configuration with the rear lower control arms. Long story short, don't go to Firestone or any other retail alignment shop after getting your kit installed. A proper off-road / 4x4 shop that deals with a lot of lifts should know what they're doing.