Gilles Berthoud makes bicycle products with apparent disregard for costs. The materials and methods and designs are always uncompromising. That is why it is surprising to me that the Gilles Berthoud decaleurs (a bracket made to attach to the bicycle stem and secure a front bag) don’t really work with the Gilles Berthoud rando bags.
The large bolt replaces the stem bolt and threads into the hole in the short piece of tubing which replaces the stem nut. The arms are bolted on to the short piece of tubing which is threaded at both ends. Then the arms can be rotated to the desired position to line up with the pieces attached to the leather trim piece along the top of the bag so all the pieces can be skewered together. The only problem is, the shape and the length of the arms allow for only a very narrow range of positions; if the arms are parallel to the ground, the bag is pushed too far forward….if the arms are rotated down so the bag can sit closer to the bars the connection point is low, potentially below the point where the pieces need to be attached to the bag. Another problem is that the arms of the decaleur interfere with closing the top flap.
I know someone with access to a machine shop who likes to tinker with bike parts so we imagined a part that would work to replace the stock arms. He did a rough sketch and gave it to his c.a.d. guy who put it into language a machine could understand and out came these:
Here’s a comparison of the original bracket arms bolted side by side with the new ones: