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Knox Trailers · Suspension & Steering
9640
In stock · ships from Knoxville
A rolling-lobe air spring (air bag) for heavy-duty trailer suspensions.
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
Verified fitment for 3 applications
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All confirmed applications for this part number.
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Designed for trailer axles with Hendrickson suspension. Not intended for drive or steer axles. Always verify collapsed/design height and mounting dimensions against your original air spring before purchasing.
Part data verified against 5 catalog sources
Numbers this part supersedes or interchanges with. Showing 14 of 14.
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It replaces Hendrickson OE part S-20223 and fits common Hendrickson trailer suspension systems like the HT-190T or HS-190T. The air spring supports the truck or trailer frame, absorbs road shock, and automatically adjusts ride height. Replace it when you notice air leaks, sagging on one side, uneven ride height, or visible damage to the rubber bellows.
Part Number: 9640
AIR SPRING (S-20223)
Unit: ea
Dealer: Knox Trailers
Compatibility, alternatives, and more
Parts commonly needed alongside suspension & steering
