The graphics are from fuelly.. where you see line go down and start oscillating that means traveling. I don't take top case off so it's either with top case or all three. Gen2 OEM TraX setup is really wide, it kills MPG by big margin but more so speed. Anything over 75 with side cases and it drops like led zeppelin. Not sure if Givi have narrowed profile for Gen3; if they didn't should be similar picture.