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Hendrickson · Suspension & Steering
9645
In stock · ships from Knoxville
This is a Hendrickson rolling lobe air spring, commonly called an air bag, used in trailer air suspension systems.
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Verified fitment for 2 applications
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All confirmed applications for this part number.
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Other applications
Exact fitment depends on your trailer’s suspension model and ride height. Verify minimum/maximum height (9.2–27.5 in) and mounting stud layout before ordering.
Part data verified against 5 catalog sources
Numbers this part supersedes or interchanges with. Showing 2 of 2.
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It replaces a worn, leaking, or sagging original spring to restore proper ride height and load-carrying capacity. Designed for low-ride-height, 23,000‑lb‑capacity tandem‑axle trailers, it features a rubber bellows and a lightweight plastic piston. Replacing with a genuine Hendrickson unit helps maintain correct suspension geometry and safe handling.
Part Number: 9645
PLASTIC-HENDRICKSON S-23612
Unit: ea
Dealer: Knox Trailers
Compatibility, alternatives, and more
Parts commonly needed alongside suspension & steering
