Aventon sells rear racks that are custom to each of our models and sizes. Find yours here, https://www.aventon.com/collections/bicycle-racks
The Planet Bike Eco Rack.is a great option if the Aventon rack is out-of-stock. The Pace 500 size S and M need an add-on Planet Bike Extended Length mounting kit. The Pace 500 size L does not need this kit. The Pace 500 Step-through in size S and M need the extended length mounting kit.