My GPS TOM TOM VIA fits perfectly with its suction cup. 3 wedges supplied are necessary. Where appropriate, an additional battery can replace (17 mm) .I tightened the knob of the ball, and the adjustment of the assembly is manually adjustable from the seated position on the bike. I hope that the selected position does not change with vibration and secousses.L'essai I have to do is still inconclusive. He has not moved (30 KM), but I have doubts with the extra weight of a possible additional battery. To see ... The use ATV or motorcycle seems risky practice terrain. I recommend this product for occasional and moderate use. It should give all satisfaction.Je have not yet tried in the rain. Good trip
