Bus air spring bags (commonly called air springs or air bellows) are durable, flexible rubber containers mounted at each wheel or axle of a bus. Instead of metal coils or leaf springs, they use compressed air to support the vehicle's weight, absorb road shocks, and provide a smooth, level ride.

Natural Height: 380mm / 15''
Outer Diameter: 190mm / 7.5''
Effective Diameter: 130.8mm / 5.1''

GUOMAT Brand
Bus Air Suspension Spring
Bus Air Spring Bags
Model Number 769N
Color Black
Rubber Material
1 Year Warranty

• FIRETONE W01-095-0204 / WO1-095-0204
• FIRETONE W01 095 0204 / WO1 095 0204
• FIRETONE W010950204 / WO10950204
• FIRETONE 1R1A380260
• FIRETONE 1R1A 380 260
• CONTITECH 769N
• CONTITECH 769 N
• GOODYEAR 8053
• PHOENIX 1E18
• PHOENIX 1E 18
• TAURUS B156
• TAURUS B 156
• DUNLOP D10S02
• CF GOMMA 1SC240-30
• CF GOMMA 1SC 240-30
• MENARINI 252933
• CF GOMMA 1S 323-23
• CF GOMMA 1S 323-23
• IRIS 5.000.786.640
• IRIS 5.000.786.641
• IRIS 5.000.805.284
• RVI 5.000.805.284
• VAN HOOL 624319-860

The system is more than just the bags; it's a complete, interconnected setup:

Air Supply: An engine-driven air compressor fills storage tanks with compressed air.

Height Control Valves: Mechanical or electronic sensors are linked to the axles. They monitor the height of the bus.

Automatic Adjustment:

• When passengers board and the bus gets heavier, the chassis starts to sink.
• The height sensor detects this drop and opens a valve, allowing compressed air to fill the air spring bags, raising the bus back to its pre-set "ride height."
• When passengers exit and the bus gets lighter, the chassis rises. The sensor releases air from the bags to lower the bus back to the correct height.
• This process ensures the bus always stays level, which is critical for safety, handling, and passenger comfort.

Leaks: The most common issue. Air can leak from a cracked or perished rubber bag, a faulty seal, or a damaged air line. You'll often hear a hissing sound.

Failed Compressor or Dryer: If the compressor fails, the entire system loses pressure, and the bus will sag. A failed dryer can lead to water in the system, causing corrosion and valve failures.

Faulty Height Valve: A stuck valve can cause the bus to over-inflate (ride too high) or deflate completely (ride on the emergency stops).