W01-358-9978 Firestone Trailer Air Spring Bag 1R12-668 Goodyear Air Suspension Replacement
Product Description
Truck air springs utilize compressed air for elastic support, replacing traditional leaf springs. They consist of a rubber airbag, piston, and air lines. Adjusting the air pressure to achieve variable stiffness effectively cushions road impacts, improving ride smoothness, load adaptability, and cargo protection, while also reducing chassis wear and noise. Their advantages include light weight, adjustable ride height, and effective shock absorption. Widely used in heavy-duty trucks, trailers, and high-end commercial vehicles, they balance comfort and economy, becoming a core component of modern truck suspension systems.
GUOMAT No.: 1T9978
Warranty: 1 Year
Material: Rubber+Steel
Packing: Carton packing
Color: Black
Application: Truck / Trailer Air Suspension
Installation: Direct Installation
Product Part Nmber/OEM Number
Automann: 566.CT67588, 566.ER9978, AB1DK23I-P959, AB1DK23I-A959, ABHS289-29
Contitech: 67588, 69744, 9 10-14 P 959
Dayton: 452-9978, 452-9978L
Firestone: 8465, 9978, W013589978, W01-358-9978
Fleetpride: AS9978
Globetech: GTK-358-9978
Goodyear: 1R121179, 1R12-1179, 1R12-668
Hendrickson: S28929, C28929, C29928, S29928
Meritor: MAF9978, FS9978
Midwest: WA01-9978C
Misc: W014559977, 69744, 76960, 77303, 67588, 67589, 75186, HDV9978
Triangle:AS-8959
Product Technical Data
| Parameter | Details |
| Air Inlet | 1/4NPT |
| Air Spring Type | Rolling Lobe Air Spring |
| Bead Plate (Top) | 231mm |
| Base Diameter | 261mm |
| Top Stud Configuration | 2X3/4-16UNF |
| Bottom Stud Configuration | 1/2-13UNC |
| Center Distance Between Screws on Top | 140mm |
| Extended Length | 470mm |
| Min.Height | 80mm |
| Natural Height | 200mm |
| Piston Height | 144.4mm |
Product After-sales Guarantee
Thank you for choosing our products! We always prioritize quality and service. We offer comprehensive after-sales protection:
√ Quality Guarantee - 12-month warranty from the date of receipt, covering non-human-caused performance failures (with valid proof of purchase).
√ Fast Response - 24/7 customer service, with a response time of less than 2 hours.
√ Worry-Free Repair - Repairs are free during the warranty period, but shipping charges are applicable.
※ Friendly Reminder
The warranty does not cover cosmetic damage or failures caused by improper use.
Product Picture 
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W01-358-9978 Firestone Trailer Air Spring Bag 1R12-668 Goodyear Air Suspension Replacement Images
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