When combining accessories and adapters, the low load capacity / payload is relevant.
Handlebar Adapter Head Tube
Handlebar Adapter · black-red
only on bikes with integrated threads at the head tube
This adapter integrates the same basic elements as the "adapter for stem". However, it can only be mounted on bikes with integrated threads at the head tube. Because the adapter is fixed directly on the frame, the steering remains completely independent of accessory weight. Its new shape increases the distance to the front wheel, so that KLICKfix bags and baskets can be mounted even onto small foldable bikes. Many Dahon or Tern bike models come prepared with a socket for this adapter.