Something to consider if you are looking for a change in gearing...a trailer will change the feel of your bike, so depending if you are going to use the trailer often you may find the stock Vybe gearing better for pulling weight.

I pull a canine trailer on my other bike and switching from my Vybe to that is like driving a tank, meaning lower gears for my legs.

Also if gearing is something that you are not happy with, changing the gears is way cheaper than buying another folder.

On my first trip using a suitcase and really enjoying having a bike on business with me, so you are in for a treat once you sort it out.