For attachment to the gallows, ttention, this one will have to see at least 90mm 100mm. At worst, it attaches to the handlebars. I use mountain biking and road. The support holds very well (on a round bracket) but fixing GPS / support is not terrible. There is the game between the 2 piece. Result: Cycling road ... impeccable because very little vibration. ATV ... disaster. At the slightest descent heckled ... it falls.
I Acroche with a lace to avoid losing it disconnects quan, but still seeks a solution to fit into place.
Now there is no choice of siupport, we must make do.