Maybe you already got to know that these nice snap-on-ortlieb-bags won’t snap to anything bigger than maybe 12mm. But what to do with those oldschool-bicycle-racks? Mine is 16mm in diameter so the last years i fixed a wooden adapter with 8mm-steelrods onto my rack. Time brought a lot of “patina” to the wood causing it to grow dark spots… so i redesigned the adapter today and just printed’em on 35mm/s (on SchorschXY). The result looks like that:
The four links are snap-on with eight black zipties to fix it. It worked well today. I don’t see any upcoming problems with that.