When mobility is a factor, fans of the original PlanetSide will certainly recognize the Quad, the new updated version of the original's ATVs to PlanetSide 2 capable of quickly getting players where they need to go fast. But the PlanetSide 2 Quad differs slightly from its predecessor's Wraith, Fury and Basilisk. This one provides players with a number of ways to enhance its weaponry, giving this little vehicle a bit more kick. The downside is that it trades defensiveness for speed and mobility. Best to stay away from those Vanguard cannons folks.
For soldiers looking to get from point A to point B rapidly, the Quad fits the bill. It has the highest top speed of any ground vehicle and is easy to acquire. The only downside is that it is not very tough, relying on its amazing speed and agility as its defense. In a battlefield where men cannot permanently die, military commanders have seen value in the quad as a flanking vehicle and have created options for several front mounted weapons.
Source: PlanetSide 2 website