What is double a arm suspension in four wheelers?

Double A-arm suspension is a type of independent suspension system used in four-wheelers. It consists of two A-shaped arms that are connected to the vehicle's frame and the wheel hub. The upper A-arm is typically longer than the lower A-arm, and the two arms are connected by a ball joint. This design allows the wheel to move up and down independently of the other wheels, which provides better traction and handling.

Advantages of double A-arm suspension:

* Improved traction and handling

* Reduced unsprung weight

* Improved ride quality

* Increased durability

* Allows for more camber and caster adjustment

Disadvantages of double A-arm suspension:

* More complex and expensive to design and manufacture

* Requires more space

* Can be more difficult to maintain

Double A-arm suspension is commonly used in high-performance four-wheelers, such as those used for racing or off-roading. It is also used in some production vehicles, such as sports cars and luxury SUVs.