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. 2.66
  2. 2.75
  3. 3.00
  4. 3.12
  1. 3.25
  2. 3.50
  3. 3.55
  4. 3.56
  1. 3.60
  2. 3.70
  3. 3.75
  4. 3.80
  1. 4.10
  2. 4.20
  3. 4.80
  4. 5.00
  1. 6.40
  2. 2.80 inches
  3. 3.00 inches
  1. 4.50
  2. 5.31
  3. 6.31
  1. 9.00
  2. 10.38
  3. 11.01
  1. 11.31
  2. 13.79
  3. 15.13
  1. 16.50
  2. 17.75
  3. 19.00
  1. 25.13
  1. 3003
  2. 3030
  3. 3048
  4. 3065
  5. 3079
  6. 3085
  7. 3096
  8. 3101
  9. 3102
  1. 3109
  2. 3123
  3. 3123 or 3132
  4. 3131
  5. 3131 or 3134
  6. 3132
  7. 3134
  8. 3135
  9. 3136
  1. 3140
  2. 3148
  3. 3187
  4. 3193
  5. 3201
  6. 3208
  7. 3210
  8. 3215
  9. 3220
  1. 3235
  2. 3255
  3. 3271
  4. 3317
  5. 3341
  6. 3355
  7. 3371
  8. 3435
  9. 3450
  1. 3452
  2. 3471
  3. 3473
  4. 3475
  5. 4299
  6. 4302
  7. 4311
  1. 4.50
  2. 5.31
  3. 6.25
  1. 6.31
  2. 9.00
  3. 10.38
  1. 11.01
  2. 11.31
  3. 13.79
  1. 15.13
  2. 16.50
  3. 17.75
  1. 19.00
  2. 25.13
  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#: W01-358-7325

Availability: 1 In Stock as of 6/28/2016 11:09:06 PM EST.
Your Price $109.06
List Price $184.04
You Save $74.98 - 41%
Genuine Firestone replacement air spring W01-358-7325. Firestone air bag 7325 is designed to provide years and thousands of miles of trouble free service.
  • Technical Specs: Firestone W01-358-7325 Data Sheet.
  • Firestone Part Number:W01-358-7325
  • Compressed Height: 3.12
  • Top Plate Number:3450
  • Top Plate Width:5.31
  • Piston Number:3436
  • Piston Width:5.31
  • Firestone Bellows Number:26
  • Goodyear Part Number:2B8-150 / 2B8-153 / 2B8-550
  • Goodyear Bellows Number:579-92-3-530
  • American Carrier Number:8003-006
  • Hendrickson Trailer NumberS-14395
  • Mack Number227QS-32
  • Triangle Part Number:4509
  • Triangle Bellows Number:6392
  • Watson & Chalin #:AS-0030
  • Sauer NumberP10-754
  • Note:TEXAS TRUCK


Part#: W01-358-6900
 
5

Availability: Typically ships in 5 to 7 business days.
Your Price $125.74
List Price $212.19
You Save $86.45 - 41%
Genuine Firestone replacement air spring W01-358-6900. Firestone air bag 6900 is designed to provide years and thousands of miles of trouble free service.
  • Firestone Part Number:W01-358-6900
  • Compressed Height: 3.12
  • Top Plate Number:3096
  • Top Plate Width:6.31
  • Piston Number:3090
  • Piston Width:6.31
  • Firestone Bellows Number:20, 20C
  • Ridewell Number:1003586900C
  • Note:Trailers De Monterrey 73312, Diesel Nacional A1Z-8127-19


Part#: W01-358-6800

Availability: Typically ships in 5 to 7 business days.
Your Price $249.99
List Price $387.36
You Save $137.37 - 35%
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
  • Note:see W01-358-6808


Part#: W01-358-6910
 
5

Availability: 3 In Stock as of 6/28/2016 11:09:01 PM EST.
Your Price $119.00
List Price $200.81
You Save $81.81 - 41%
Genuine Firestone replacement air spring W01-358-6910. Firestone air bag 6910 is designed to provide years and thousands of miles of trouble free service.
  • Technical Specs: Firestone W01-358-6910 Data Sheet.
  • Firestone Part Number:W01-358-6910
  • Compressed Height: 3.12
  • Top Plate Number:3079
  • Top Plate Width:6.31
  • Piston Number:3090
  • Piston Width:6.31
  • Firestone Bellows Number:20
  • Goodyear Part Number:2B9-200
  • Goodyear Bellows Number:578-92-3-202
  • Granning Number:1371
  • Hendrickson Trailer NumberS-8768
  • Hendrickson Truck Number45843-3
  • Ridewell Number:1003586910C
  • Triangle Part Number:4320
  • Triangle Bellows Number:6325
  • Watson & Chalin #:AS-0001
  • Note:Diesel Nacional AX-8127-19


Part#: W01-358-7145

Availability: 3 In Stock as of 6/28/2016 11:09:05 PM EST.
Your Price $154.90
List Price $261.39
You Save $106.49 - 41%
Genuine Firestone replacement air spring W01-358-7145. Firestone air bag 7145 is designed to provide years and thousands of miles of trouble free service.
  • Technical Specs: Firestone W01-358-7145 Data Sheet.
  • Firestone Part Number:W01-358-7145
  • Compressed Height: 3.12
  • Top Plate Number:3131
  • Top Plate Width:11.31
  • Piston Number:3130
  • Piston Width:11.31
  • Firestone Bellows Number:21
  • Goodyear Part Number:2B14-354
  • Goodyear Bellows Number:578-92-3-353
  • Mack Number57QL239
  • Ridewell Number:1003587145C
  • Triangle Part Number:4374
  • Triangle Bellows Number:6329
  • Volvo Number35203-0005


Part#: W01-358-7185

Availability: 4 In Stock as of 6/28/2016 11:09:05 PM EST.
Your Price $145.32
List Price $245.24
You Save $99.92 - 41%
Genuine Firestone replacement air spring W01-358-7185. Firestone air bag 7185 is designed to provide years and thousands of miles of trouble free service.
  • Technical Specs: Firestone W01-358-7185 Data Sheet.
  • Firestone Part Number:W01-358-7185
  • Compressed Height: 4.20
  • Top Plate Number:3201
  • Top Plate Width:9.00
  • Piston Number:3183
  • Piston Width:9.00
  • Firestone Bellows Number:22
  • Goodyear Part Number:2B12-318
  • Goodyear Bellows Number:578-92-3-309
  • Note:CHALMERS, Trailers De Monterrey 73312


Part#: W01-358-7180

Availability: Typically ships in 5 to 7 business days.
Your Price $151.73
List Price $224.18
You Save $72.45 - 32%
Genuine Firestone replacement air spring W01-358-7180. Firestone air bag 7180 is designed to provide years and thousands of miles of trouble free service.
  • Technical Specs: Firestone W01-358-7180 Data Sheet.
  • Firestone Part Number:W01-358-7180
  • Compressed Height: 3.12
  • Top Plate Number:3215
  • Top Plate Width:9.00
  • Piston Number:3212
  • Piston Width:9.00
  • Firestone Bellows Number:22
  • Goodyear Part Number:2B12-425
  • Goodyear Bellows Number:578-92-3-309
  • Ridewell Number:1003587180C
  • Triangle Part Number:4363
  • Triangle Bellows Number:6316
  • Note:PEERLESS # 0550-00001


Part#: W01-358-7025

Availability: 5 In Stock as of 6/28/2016 11:09:06 PM EST.
Your Price $125.00
List Price $210.93
You Save $85.93 - 41%
Genuine Firestone replacement air spring W01-358-7025. Firestone air bag 7025 is designed to provide years and thousands of miles of trouble free service.
  • Firestone Part Number:W01-358-7025
  • Compressed Height: 2.66
  • Top Plate Number:3030
  • Top Plate Width:4.50
  • Piston Number:3025
  • Piston Width:4.50
  • Firestone Bellows Number:25
  • Note:Western Star (cab spring)


Part#: FIR6776

Availability: 2 In Stock as of 6/28/2016 11:09:11 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#: W01-358-3400

Availability: 9 In Stock as of 6/28/2016 11:09:03 PM EST.
Your Price $104.50
List Price $176.56
You Save $72.06 - 41%
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


Part#: W01-358-7472

Availability: 2 In Stock as of 6/28/2016 11:09:08 PM EST.
Your Price $131.66
List Price $222.18
You Save $90.52 - 41%
Genuine Firestone replacement air spring W01-358-7472. Firestone air bag 7472 is designed to provide years and thousands of miles of trouble free service.
  • Technical Specs: Firestone W01-358-7472 Data Sheet.
  • Firestone Part Number:W01-358-7472
  • Compressed Height: 3.12
  • Top Plate Number:3210
  • Top Plate Width:9.00
  • Piston Number:3212 or 3183
  • Piston Width:9.00
  • Firestone Bellows Number:228CT-1.5
  • Goodyear Part Number:2B12-434
  • Goodyear Bellows Number:578-92-3-310
  • Hendrickson Canada Number:B-12514-005
  • Hendrickson Trailer NumberS-12335
  • Triangle Part Number:4371
  • Triangle Bellows Number:6328
  • Note:Replaces W01-358-7404


Part#: W01-358-6902

Availability: 2 In Stock as of 6/28/2016 11:09:00 PM EST.
Your Price $131.57
List Price $222.03
You Save $90.46 - 41%
Genuine Firestone replacement air spring W01-358-6902. Firestone air bag 6902 is designed to provide years and thousands of miles of trouble free service.
  • Technical Specs: Firestone W01-358-6902 Data Sheet.
  • Firestone Part Number:W01-358-6902
  • Compressed Height: 4.10
  • Top Plate Number:3079
  • Top Plate Width:6.31
  • Piston Number:3100
  • Piston Width:6.31
  • Firestone Bellows Number:20
  • Goodyear Part Number:2B9-201
  • Goodyear Bellows Number:578-92-3-202
  • Granning Number:4848
  • Hendrickson Auxiliary NumberS-2630
  • Ridewell Number:1003586902C
  • Triangle Part Number:4310
  • Triangle Bellows Number:6325
  • Watson & Chalin #:AS-0002
  • Suspensions Inc. Number200042


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.