This air-ride pin box uses gas shock and air-bag technology to isolate vibration and control the forward-and-back motion known as chucking. The scissor-action design allows the air bag to absorb road shock while the gas shock handles rebound, resulting in a smoother ride and reduced coach wear.

• 21,000 lb gross weight capacity
• Air-ride suspension with gas shock and air bag
• King-pin coupler type
• 22-7/16″ length, 12-1/2″ width
• 3-row bolt pattern
• Includes king pin
• Black powder-coated steel construction
• Reduces driver fatigue and coach damage
• Limited 1-year warranty