Firestone 550140 Air Spring Suspension Airbag

The Firestone 550140 is a heavy-duty air spring designed to provide adjustable load support and improved ride quality for vehicles with suspension systems. This pneumatic helper spring installs between the frame and axle to supplement existing suspension components.

Key Features:

• Durable rubber construction with reinforced fabric cords for long service life
• Adjustable air pressure allows customization of load support from 5 to 100 PSI
• Helps level vehicle stance when hauling heavy loads or towing trailers
• Reduces body roll and sway for improved handling and stability
• Easy to install with standard air fittings and mounting hardware
• Compatible with onboard air compressor systems or manual inflation

Firestone air springs are engineered to handle the demands of commercial and recreational vehicles, providing consistent performance under varying load conditions. The 550140 model delivers reliable air suspension support for better vehicle control and comfort.