Crossbar shims shim .5" /12.7mm OD crossbars up to 22.2mm, so that you can mount accessories designed to attach to a 22.2mm handlebar on your crossbar. The middle of your bars is such a convenient location - As Elon Musk would say, "Space is important and we mustn't waste it!"
-Shims are 1.25" wide, enough width for most things - bells, gps, etc.
-6061 aluminum, machined in house on 80 year old equipment. If these are popular enough, we may cough up to have a run CNC machined.
-Weighs 20 grams