I currently have 800mm on both bikes. Feels alright, although I'm just wondering what everyone else is doing. I'm probably going to cut down the bar on my trail bike to test things out only because now with crazy long reaches and super short stems, the wider the bar the more over steering you get. I know I notice it when I have to be precise with my steering. I find in situations where I get nervous, the more oversteer I get the more chance I have of over correcting and crashing. Everything I'm reading points to the 'pros' riding anywhere from 750mm to 785mm.