Double Convoluted Air Springs

Double-Convoluted air bags from Firestone come in a wide selection of ride heights with various port and bolt configurations. The have a double bellows and look like two air springs stacked on top of each other. They are used by major suspension manufacturers like Hendrickson, Watson & Chalin, Ridewell, Reyco, Granning, Fruehauf and more.

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  1. 1/8 NPT
  2. 1/4 NPT
  3. 3/8 NPT
  4. 1/2 NPT
  5. 3/4 NPT
  1. 8.30 inches
  2. 8.91 inches
  3. 9.00 inches
  1. 6.60 inches
  2. 7.52 inches
  3. 8.60 inches
  1. 5.50-6.50 inches
  2. 5.50-7.00 inches
  3. 7.00-8.00 inches
Part#: FIR6410

Availability: 2 In Stock as of 2/5/2016 6:08:42 PM EST.
Your Price $159.03
List Price $232.25
You Save $73.22 - 32%
Firestone Ride-Rite replacement air helper spring 6410. Rear 267C1.5 Style Double Convoluted air bag with 1/8 NPT 5/8 inch inch Air Inlet.
  • Firestone Part Number:6410
  • Compressed Height: 2.80 inches
  • Extended Length (IN):8.30 inches
  • Ride Height:5.50-6.50 inches
  • Maximum Diameter:6.60 inches
  • Air Inlet:1/8 NPT
  • Manufacturers Part Number:6410


Part#: FIR6776

Availability: 2 In Stock as of 2/5/2016 6:08:41 PM EST.
Your Price $145.50
List Price $191.22
You Save $45.72 - 24%
Firestone Ride-Rite replacement air helper spring 6776. Rear 224C Style Double Convoluted air bag with 1/2 NPT Air Inlet.
  • Firestone Part Number:6776
  • Compressed Height: 3.00 inches
  • Extended Length (IN):8.91 inches
  • Ride Height:5.50-7.00 inches
  • Maximum Diameter:7.52 inches
  • Air Inlet:1/2 NPT
  • Manufacturers Part Number:6776


Part#: FIR6782

Availability: 2 In Stock as of 2/5/2016 6:08:43 PM EST.
Your Price $147.63
List Price $194.02
You Save $46.39 - 24%
Firestone Ride-Rite replacement air helper spring 6782. Rear 267C1.5 Style Double Convoluted air bag with 3/8 NPT Air Inlet.
  • Firestone Part Number:6782
  • Compressed Height: 2.80 inches
  • Extended Length (IN):8.30 inches
  • Ride Height:5.50-6.50 inches
  • Maximum Diameter:6.60 inches
  • Air Inlet:3/8 NPT
  • Manufacturers Part Number:6782


Part#: FIR6783

Availability: Typically ships in 5 to 7 business days.
Your Price $131.02
List Price $191.32
You Save $60.30 - 32%
Firestone Ride-Rite replacement air helper spring 6783. Rear 267C1.5 Style Double Convoluted air bag with 3/4 NPT Air Inlet.
  • Firestone Part Number:6783
  • Compressed Height: 2.80 inches
  • Extended Length (IN):8.30 inches
  • Ride Height:5.50-6.50 inches
  • Maximum Diameter:6.60 inches
  • Air Inlet:3/4 NPT
  • Manufacturers Part Number:6783


Part#: FIR6784

Availability: 2 In Stock as of 2/5/2016 6:08:42 PM EST.
Your Price $145.50
List Price $191.22
You Save $45.72 - 24%
Firestone Ride-Rite replacement Air Helper Spring 6784. Rear 267C1.5 Style Double Convoluted air bag with 1/4 NPT Air Inlet.
  • Firestone Part Number:6784
  • Compressed Height: 2.80 inches
  • Extended Length (IN):8.30 inches
  • Ride Height:5.50-6.50 inches
  • Maximum Diameter:6.60 inches
  • Air Inlet:1/4 NPT
  • Manufacturers Part Number:6784


Part#: FIR6786

Availability: 1 In Stock as of 2/5/2016 6:08:42 PM EST.
Your Price $152.12
List Price $199.93
You Save $47.81 - 24%
Ride-Rite replacement air helper spring 6786. Rear 267C1.5 Style Double Convoluted air bag with1/2 NPT Air Inlet.
  • Firestone Part Number:6786
  • Compressed Height: 2.80 inches
  • Extended Length (IN):8.30 inches
  • Ride Height:5.50-6.50 inches
  • Maximum Diameter:6.60 inches
  • Air Inlet:1/2 NPT
  • Manufacturers Part Number:6786


Part#: FIR6827

Availability: 4 In Stock as of 2/5/2016 6:08:44 PM EST.
Your Price $176.21
List Price $257.33
You Save $81.12 - 32%
Firestone Ride-Rite replacement air helper spring 6827. Rear 26C Style Double Convoluted air bag with3/8 NPT Air Inlet.
  • Firestone Part Number:6827
  • Compressed Height: 3.00 inches
  • Extended Length (IN):9.00 inches
  • Ride Height:7.00-8.00 inches
  • Maximum Diameter:8.60 inches
  • Manufacturers Part Number:6827


Part#: FIR6836

Availability: Typically ships in 5 to 7 business days.
Your Price $145.50
List Price $191.22
You Save $45.72 - 24%
Firestone Ride-Rite replacement air helper spring 6836. Rear 224C Style Double Convoluted air bag with 1/2 NPT Air Inlet.
  • Firestone Part Number:6836
  • Compressed Height: 3.00 inches
  • Extended Length (IN):8.91 inches
  • Ride Height:5.50-7.00 inches
  • Maximum Diameter:7.52 inches
  • Air Inlet:1/2 NPT
  • Manufacturers Part Number:6836


Part#: FIR6837

Availability: 2 In Stock as of 2/5/2016 6:08:42 PM EST.
Your Price $147.63
List Price $194.02
You Save $46.39 - 24%
Firestone Ride-Rite replacement Air Helper Spring 6837. Rear 224C Style Double Convoluted air bag with 3/8 NPT Air Inlet.
  • Firestone Part Number:6837
  • Compressed Height: 3.00 inches
  • Extended Length (IN):8.91 inches
  • Ride Height:5.50-7.00 inches
  • Maximum Diameter:7.52 inches
  • Air Inlet:3/8 NPT
  • Manufacturers Part Number:6837


Part#: FIR7676

Availability: 1 In Stock as of 2/5/2016 6:08:41 PM EST.
Your Price $142.37
List Price $196.95
You Save $54.58 - 28%
Firestone Ride-Rite Air Helper Spring 7676. 224C Style Double Convoluted air bag with 1/2 NPT Air Inlet.
  • Firestone Part Number:7676
  • Compressed Height: 3.00 inches
  • Extended Length (IN):8.91 inches
  • Ride Height:5.50-7.00 inches
  • Maximum Diameter:7.52 inches
  • Air Inlet:1/2 NPT
  • Manufacturers Part Number:7676


Part#: FIR7677

Availability: 1 In Stock as of 2/5/2016 6:08:43 PM EST.
Your Price $176.21
List Price $257.33
You Save $81.12 - 32%
Firestone Ride-Rite Air Helper Spring 7677. 26C Style Double Convoluted air bag with 1/2 NPT Air Inlet.
  • Firestone Part Number:7677
  • Compressed Height: 3.00 inches
  • Extended Length (IN):9.00 inches
  • Ride Height:7.00-8.00 inches
  • Maximum Diameter:8.60 inches
  • Air Inlet:1/2 NPT
  • Manufacturers Part Number:7677


Part#: FIR7687

Availability: Typically ships in 5 to 7 business days.
Your Price $147.63
List Price $194.02
You Save $46.39 - 24%
Firestone Ride-Rite Air Helper Spring 7687 is intended to replace an old, worn out or defective air bag from your original Firestine air bag kit. 25C Style double convoluted, 5.25 inch height, 5.7 inch diameter, 1600 lbs. maximum load at 100 psi with 3/8 NPT air inlet.
  • Firestone Part Number:W21-760-7687
  • Firestone Bellows Number:268C


An uncompressed Air Bag

Air springs offer many other user-friendly advantages over the traditional leaf and coil springs.

A compressed Air Bag

The gas is air and the container is a sealed fabric-reinforced rubber bellow or sleeve. Similar to a ball inflated with air, the load an air spring will carry depends on its diameter and therefore, the area of the column of air supported and the pressure of air inside it.

A cross-section of a compressed Air Bag

The ability to change the load carrying capacity simply by changing the air pressure, rather than changing out the spring, is a major advantage air springs have over steel. Because an air spring consists of a closed volume of air, the compression of the air spring (jounce travel) will cause an increase in pressure, while the extension of the air spring (rebound travel) will cause a decrease in pressure.


A cross section of a firestone convoluted air bag
  1. Blind Nut

    A permanent part of the bead plate assembly providing an alternate mounting system to the stud.

  2. Air Fitting Hole

    A tapped hole usually 1/4" N.P.T. providing air entrance for the part.

  3. Bead Plate

    Permanently crimped onto the bellows at the factory allowing complete part leak testing prior to shipment.

  4. Bellows

    The heart of an Airide spring. Includes at least four plies, or layers, of material–an inner layer, two plies of cord-reinforced fabric, and an outer layer.

  5. Girdle Hoop

    A ring between the convolutions of the convoluted type air spring.