Personally 720 mm would not be comfortable for me. I like around 660 to 640 mm on a hybrid/flat handlebar road bike. The other thing is I like a true flat bar not a riser and a sweep of no more than 6 degrees. Most of the MTN bars seem to be too long and too much sweep for use on anything but a MTN bike IMHO. Also if you purchased a quality bar cutting that much off WILL change quite a bit of the characteristics of bar itself. If a no-name Chinese bar who know. Good luck