Description
The World American WA01-9370C is a rolling-lobe trailer air spring. It is an aftermarket replacement for Watson & Chalin AS-0057, Firestone W01-358-9370, and ContiTech AS9370. The spring uses a 9-inch top plate with 2 holes at 6.2-inch center-to-center and a 10.31-inch parallel bottom plate.
Specifications
| Manufacturer | World American |
|---|---|
| Part Number | WA01-9370C |
| Part Type | Trailer Air Spring (Rolling Lobe) |
| Design Height | 18 in |
| Min / Max Height | 9.8 in / 28.5 in |
| Maximum Diameter | 12.6 in |
| Load Rating @ 80 psi | 5,500 lb |
| Load Rating @ 100 psi | 7,000 lb |
| Top Plate | 9 in dia, 2 holes, 6.2 in C-to-C |
| Bottom Plate | 10.31 in dia, 1 hole, 2.25 in C-to-C, parallel alignment |
| Natural Frequency | 55 Hz |
Cross References
This part replaces or is equivalent to the following part numbers:
- Watson & Chalin: AS-0057
- Firestone: W01-358-9370, 9370
- ContiTech (Continental): AS9370, 9 10-21 P 448, 64383
- Goodyear: 1R12-440, 1R12-580
- Meritor: FS9370, RFS9370
- Newstar: S-23177
- Paccar Parts: AS93700
- Dayton Parts: 352-9370
- Euclid: E-FS9370
- HDValue: HDV9370
- Triangle Air Springs: AS-8448, 8448
- Also known as: AB1DK23N-9370, 1003589370C, 10-99370
Applications
This trailer air spring fits trailer suspensions originally equipped with Watson & Chalin AS-0057 or any of the cross-referenced part numbers above. Typical platforms include:
- Watson & Chalin trailer air-ride suspensions
- Continental / ContiTech AS9370-equipped trailer suspensions
Verify your existing air spring part number, plate dimensions, and stud pattern before ordering.









