Can the bike support a child seat (assuming up to age 5/6) in the back with the rear aluminum rack?

Yes! Any child seat can be attached to our rear racks as they are standard dimensions. We recommend the Thule Yepp Maxi Rack will fit with our rear carrier but you will need the Thule Yepp Maxi Easyfit Adapter (its the base which you see the seat clicking into place in this video https://www.youtube.com/watch?v=2Du-px6Al7)

Please reach out with any question you might have related to different models you're evaluating or other questions.