Alright so I just got a brand new pair of 185 jj's and am overly stoked on them. But I have ran into the dilemma on where to mount them. I am 5'11 155 and on these I will do 55% charging, 25% jibbing and screwing around, and 20% trees. The factory recommended is -5. I was thinking -4 but I don't know.
That said, I loved my 185cm JJ's mounted at recommended for everything. I rode them every day the season that I owned mine; regardless of the condition. My only gripe was that they were too short for me. If there were a 191cm+ size available I would definitely pick them up.