i'm playing with a cargo bike idea and have a chance at some material for the rear deck that there's some extra of at work. there's only enough to try it once so i'm wondering how wide (about) they are. i was thinking about 8" but after measuring a couple of normal racks they were about 5.5" wide. seems like wider would be better, up to a point at least.
could i get a couple of measurements if anyones willing? thanks.