Advantage of Ergon is they designed the bar end and comfort grip as a integrated combination.. you bought the GR 1?
I have Ergons GR3 on my Brompton and my Bike Friday Tikit,
IF your worry is :
You can catch them on all sorts of things and knock yourself down.
I recommend Figure 8 bend trekking bars , which form a closed loop ahead of your shifter/brake levers ,
and have side hand-grip-positions equivalent of bar ends...
I have 2 of these on my other IGH bikes , with Grip shifters and MTB brake levers...
[1 my Bike Friday Pocket Llama Folding travel bike with Disc Brakes & a R'off hub. ] IE 'folding'
...