Ended up with 12"FBI's. Used NAMZ 12" extensions for the controls only all other cables and wires were long enough. The clutch & bake lines are just long enough so any higher or wider would have been an issue. Pulling the wires was super easy. I was in no rush so didn't put a clock on the job and did it over a few days but would guess I had 6-8 hrs. I think the stock mirrors will work but won't know for sure till the salt is off the roads.
I have Yaffe 14" Monkey bars installed on my 18 CVO road glide. Very comfortable, but I knew that as I had them on my 12 CVO road glide, and 17 CVO Street glide and they are on my 13 CVO King.
Hey I have a 2018 SGS as well. How comfortable are these bars? Do the stock cables work? How tall are you?
Love the bars, very comfortable also added a Mustang Tripper Fastback seat that pushed me back a bit.
I am 5' 11". Stock cables and wiring work fine. Check out "ride it wrench it" on youtube for install of bars. Followed it to a "T" and had no problems at all