Hendrickson S-28929 | Heavy-Duty Air Spring

Hendrickson S-28929 Heavy-Duty Air Spring for Commercial Trailer Air Suspensions

The Hendrickson S-28929 Heavy-Duty Air Spring is a genuine OEM replacement air suspension spring engineered specifically for Hendrickson trailer suspension systems. Designed to restore proper ride height, suspension performance, and load support, the S-28929 delivers exceptional durability and ride quality for commercial trailers operating in demanding highway and vocational applications.

Manufactured and validated by Hendrickson, this premium air spring utilizes a low-frequency design that improves ride quality while helping reduce vibration, suspension wear, and maintenance costs. Built with premium rubber compounds and engineered piston technology, the S-28929 provides long-lasting performance for fleets, owner-operators, and trailer repair facilities.

The Hendrickson S-28929 is commonly used on VANTRAAX® HKANT 40K trailer suspension systems manufactured after January 2008. Always verify your suspension model before ordering.

Key Features

• Genuine Hendrickson OEM air spring
• Designed specifically for Hendrickson trailer suspensions
• Restores proper ride height and suspension performance
• Premium heavy-duty rubber construction
• Low-frequency design improves ride quality
• Excellent resistance to harsh road conditions
• OEM fit, function, and reliability
• Ideal for commercial fleets and owner-operators

Specifications

• Brand: Hendrickson
• Part Number: S-28929
• Product Type: Heavy-Duty Air Spring
• Suspension Type: Trailer Air Suspension
• Condition: New
• OEM Replacement: Yes

Verified Applications

• Hendrickson VANTRAAX® HKANT 40K Trailer Suspension (January 2008 and newer)
• Commercial Dry Van Trailers
• Refrigerated Trailers
• Flatbed Trailers
• Heavy-Duty Air Ride Trailer Suspensions

Important: Hendrickson advises that the newer S-28929 air spring should not be mixed with the earlier S-22948 design on the same suspension. Replace both air springs together when converting from the older design. This helps maintain proper suspension performance and prevents premature wear.

Verified Cross Reference Part Numbers

• Hendrickson C-28929
• Hendrickson S-28929-48
• Firestone W01-358-9978
• Firestone 1T15M-4
• ContiTech AS9978
• ContiTech 67588
• Goodyear 1R12-668
• Goodyear 1R12-1179
• Meritor FS9978
• World American WA01-9978C
• Automann MHSK485
• Triangle AS8959
• Torque TR9978

Always verify your VIN, suspension model, or existing air spring before ordering to ensure proper fitment.

Performance Benefits

• ✔ Restores factory ride quality
• ✔ Reduces vibration and road shock
• ✔ Supports proper trailer ride height
• ✔ Improves suspension stability
• ✔ Helps extend suspension component life
• ✔ OEM-engineered for maximum durability

Why Choose Genuine Hendrickson Air Springs?

Hendrickson engineers its air springs as part of a complete suspension system—not as universal replacements. Genuine Hendrickson air springs are designed, tested, and validated to deliver the correct spring rate, ride height, and durability for your specific suspension, helping maximize uptime and reduce long-term maintenance costs.