Wicked Chili bike / scooter / motorcycle bracket with safety strap for Apple iPhone 5S / 5 (precisely, QuickFix, Made in Germany) black (accessories) 4
The mount is a good compromise between price and performance. It is stable, easy to install and relatively discreet on the handlebars. When installing it is necessary to pay attention not to overtighten the screws to turn, otherwise are the plastic after (unfortunately, in another attitude happened once).
Even with larger vibration the iPhone is held firmly and even though I've never used the additional rubber.