Folding bikes are marketed as a one size fits all solution. Generally, they do a great job, however some people have a longer torso as compared to their wingspan and vice versa. This can create a sizing nightmare for a one size fits all solution. 

No problem hi ride bars come to the rescue. Rise bars can be rotated up, out or in towards the rider. This minor change can help customization for riders with atypical proportions. Make sure to buy a bike with a rise bar. It may help you fit comfortably, your kids, friends. It is an essential component for any folding bike.