Betweeen frame and vehicle axle

Between high control valve and frame

Between air pressure regulator and front axle

Between brake tank and vehicle axle

Used for leveling purpose

Reduce the suspension weight

Increase the directional stability

Reduce the space ocupation

More maintanance cost

Vibration damping is less effective

Shocks transmitted from one wheel to other

Spring weight is more

This is simple arrangement

Shocks are transmitted from one wheel to other

Spring weight is less

Maintance cost is less

Spring weight is less

Vibration damping is less effective

This is a complicated arrangement

Maintanance cost is more