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Double Convoluted Air Springs
Part#: W01-358-3400
List Price $176.56
Your Price $104.50
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Genuine Firestone replacement air spring W01-358-3400. Firestone air bag 3400 is designed to provide years and thousands of miles of trouble free service.
  • Technical Specs: Firestone W01-358-3400 Data Sheet.
  • Firestone Part Number:W01-358-3400
  • Compressed Height: 2.75
  • Top Plate Number:3450
  • Top Plate Width:5.31
  • Piston Number:3436
  • Piston Width:5.31
  • Firestone Bellows Number:224
  • Goodyear Part Number:2B7-540
  • American Carrier Number:8003-009
  • Availability:In Stock

Part#: W01-358-3402
List Price $198.32
Your Price $117.52
You Save $80.80 - 41%
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Genuine Firestone replacement air spring W01-358-3402. Firestone air bag 3402 is designed to provide years and thousands of miles of trouble free service.
  • Technical Specs: Firestone W01-358-3402 Data Sheet.
  • Firestone Part Number:W01-358-3402
  • Compressed Height: 2.75
  • Top Plate Number:3355
  • Top Plate Width:5.31
  • Piston Number:3453
  • Piston Width:5.31
  • Firestone Bellows Number:224
  • American Carrier Number:8003-026
  • Availability:Ships in 3 to 4 days
  • Note:(supercedes 9455-Bellows 1T47A-1) (replaces 3401-3405)

Part#: W01-358-3406
List Price $129.32
Your Price $114.95
You Save $14.37 - 11%
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Genuine Firestone replacement air spring W01-358-3406. Firestone air bag 3406 is designed to provide years and thousands of miles of trouble free service.
  • Technical Specs: Firestone W01-358-3406 Data Sheet.
  • Firestone Part Number:W01-358-3406
  • Compressed Height: 2.75
  • Top Plate Number:3371
  • Top Plate Width:5.31
  • Piston Number:3436
  • Piston Width:5.31
  • Firestone Bellows Number:224
  • Sauer NumberP20-706
  • Availability:Ships in 3 to 4 days

Part#: W01-358-6789
List Price $224.18
Your Price $132.84
You Save $91.34 - 41%
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Genuine Firestone replacement air spring W01-358-6789. Firestone air bag 6789 is designed to provide years and thousands of miles of trouble free service.
  • Firestone Part Number:W01-358-6789
  • Compressed Height: 3.70
  • Top Plate Number:3271
  • Top Plate Width:9.00
  • Piston Number:3281
  • Piston Width:9.00
  • Firestone Bellows Number:22-1.5
  • Triangle Bellows Number:4512
  • American Carrier Number:6328
  • Hendrickson Auxiliary Number001503
  • Availability:Ships in 3 to 4 days

Part#: W01-358-6799
List Price $438.71
Your Price $259.97
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Genuine Firestone replacement air spring W01-358-6799. Firestone air bag 6799 is designed to provide years and thousands of miles of trouble free service.
  • Firestone Part Number:W01-358-6799
  • Compressed Height: 3.60
  • Top Plate Number:3132
  • Top Plate Width:11.31
  • Piston Number:3122
  • Piston Width:11.31
  • Firestone Bellows Number:233-2
  • Holland (Neway) Number:905-57-203
  • Availability:Ships in 3 to 4 days

Part#: W01-358-6800
List Price $387.36
Your Price $249.99
You Save $137.37 - 35%
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Genuine Firestone replacement air spring W01-358-6800. Firestone air bag 6800 is designed to provide years and thousands of miles of trouble free service.
  • Firestone Part Number:W01-358-6800
  • Compressed Height: 3.00
  • Top Plate Number:3131 or 3134
  • Top Plate Width:11.31
  • Piston Number:3130
  • Piston Width:11.31
  • Firestone Bellows Number:21-2
  • Triangle Part Number:4518
  • Triangle Bellows Number:6336
  • Watson & Chalin #:AS-0034
  • Availability:Ships in 3 to 4 days
  • Note:see W01-358-6808

Part#: W01-358-6801
List Price $387.36
Your Price $229.55
You Save $157.81 - 41%
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Genuine Firestone replacement air spring W01-358-6801. Firestone air bag 6801 is designed to provide years and thousands of miles of trouble free service.
  • Technical Specs: Firestone W01-358-6801 Data Sheet.
  • Firestone Part Number:W01-358-6801
  • Compressed Height: 3.80
  • Top Plate Number:3134
  • Top Plate Width:11.31
  • Piston Number:3130
  • Piston Width:11.31
  • Firestone Bellows Number:21-2
  • Goodyear Part Number:2B14-365
  • Goodyear Bellows Number:578-92-3-356
  • Triangle Part Number:4451
  • Triangle Bellows Number:6336
  • Hendrickson Trailer NumberS-2734
  • Ridewell Number:1003586801C
  • Watson & Chalin #:AS-0021
  • Availability:Ships in 3 to 4 days
  • Note:EZ RIDE 8030160

Part#: W01-358-6803
List Price $294.43
Your Price $233.73
You Save $60.70 - 21%
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Genuine Firestone replacement air spring W01-358-6803. Firestone air bag 6803 is designed to provide years and thousands of miles of trouble free service.
  • Technical Specs: Firestone W01-358-6803 Data Sheet.
  • Firestone Part Number:W01-358-6803
  • Compressed Height: 4.80
  • Top Plate Number:3193
  • Top Plate Width:11.31
  • Piston Number:3122
  • Piston Width:11.31
  • Firestone Bellows Number:21-2
  • Goodyear Part Number:2B14-366
  • Goodyear Bellows Number:578-92-3-353
  • Triangle Part Number:4449
  • Triangle Bellows Number:6336
  • Hendrickson Trailer NumberS-6412
  • Availability:Ships in 3 to 4 days
Double Convoluted Air Springs
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.