Air Spring Bellows (Air Springs) for Trucks, Trailers and Buses

HANN is a Turkish manufacturer of heavy-duty air spring bellows for commercial vehicles. The range covers 760 references in 7 types - 411 for trucks, 283 for trailers and 66 for buses - and is matched to 5,988 OEM and cross-reference entries from more than 100 vehicle and air spring brands, including Firestone, ContiTech, Goodyear, Vibracoustic, Phoenix, Volvo, Mercedes-Benz, Scania, MAN, DAF, SAF and Hendrickson.

What is an air spring bellow?

An air spring bellow (also written air bellows, air suspension bellows or air bag) is the flexible rubber member of an air spring, mounted between the chassis and the axle. Compressed air inside the bellow carries the load; a levelling valve adds or releases air so the vehicle keeps the same ride height whether it is empty or fully loaded.

The terms are often used interchangeably. Strictly, the bellow is only the rubber-fabric part, while a complete air spring is the bellow assembled with its top plate and piston, ready to bolt on.

Parts of an air spring

• Bellow (flexible member) - layers of rubber reinforced with fabric cord plies; the rubber seals the air, the cords carry the pressure.
• Top plate (bead plate) - closes the bellow at the top and carries the mounting studs and the air inlet.
• Piston - metal or plastic base that the bellow rolls over as the suspension moves (rolling-lobe designs).
• Mounting hardware - studs, bolts and air fitting that fix the air spring to the chassis and axle.

Should I replace only the bellow or the complete air spring?

Replace only the bellow when the piston and top plate are undamaged; replace the complete air spring when the piston is corroded, cracked or deformed. Service (pistonless) bellows are the largest group in the HANN range - 248 of 760 references - because replacing the rubber part alone is the lower-cost repair on trucks, trailers and buses.

Air spring bellow types

HANN produces seven air spring types. Reference counts below are taken from the HANN product catalogue as of November 2026.

How do I find the right air spring bellow?

Match the part by number, not by appearance - two bellows that look alike can differ in height, stroke or air inlet position.

1. Read the number moulded on the bellow or stamped on the top plate (OEM, Firestone, ContiTech, Goodyear or other code).
2. Enter it in the product search. Spaces, dots and dashes are ignored, so "1 D 28 F-5", "1.D.28.F-5" and "1D28F5" return the same air spring.
3. Example: ContiTech 99K-15 P-1163 matches HANN service air spring H01.1163.S.
4. If no number is readable, send the export team the vehicle make, axle position, top-plate stud spacing, air inlet position and the compressed and extended heights.

When should an air spring bellow be replaced?

• Audible air leak, or the vehicle sinks or leans after standing
• Cracks, abrasion, bulges or chafe marks on the rubber, especially at the rolling fold
• The compressor runs more often than normal to hold system pressure
• The vehicle no longer returns to its correct ride height

Inspect the air spring on the opposite side of the same axle at the same time; a worn pair can give uneven ride height and load distribution.

HANN air spring bellows at a glance

• 760 air spring and bellow references in 7 types
• 5,988 OEM and cross-reference entries; more than 4,300 unique part numbers from 100+ brands
• Up to 4,000,000-cycle endurance testing, 100% final inspection, 2-year warranty
• ISO 9001, ISO 14001 and ISO 45001 certified
• Manufacturer and exporter since 2013 - made in Bursa, Türkiye, delivered worldwide

Air spring bellow FAQ

What is the difference between an air spring and an air spring bellow?

The bellow is the rubber-fabric part that holds the air; the air spring is the complete assembly of bellow, top plate and piston. In everyday trade use, "air spring", "air bellow" and "air bag" all refer to the same suspension component.

Does HANN manufacture its own air spring bellows?

Yes. HANN designs and manufactures air springs at its own facilities in Bursa, Türkiye, with in-house rubber production and quality control across design, production and final inspection.

Can I buy only the bellow without the piston?

Yes. HANN offers 248 service (pistonless) bellows for trucks, trailers and buses, for use when the original piston and top plate are still in good condition.

How do I match an air spring by OEM or cross-reference number?

Enter the OEM, cross-reference or HANN code in the product search - spaces, dots and dashes are ignored. For example, ContiTech 99K-15 P-1163 returns HANN H01.1163.S.

Which brands do HANN air springs cross-reference?

More than 100, including Firestone, ContiTech, Goodyear, Vibracoustic, Phoenix, Volvo, Mercedes-Benz, Scania, MAN, DAF, SAF and Hendrickson.

Which vehicles do HANN air springs fit?

Trucks (411 references), trailers (283) and buses (66), including truck cab suspension.

What warranty do HANN air springs carry?

Two years. Every air spring passes 100% final inspection, and designs are endurance-tested for up to 4,000,000 cycles.

Can I become a HANN air spring distributor?

Yes - apply via the Dealership & Distribution page or contact the export team.