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Firestone · Suspension & Steering
8091
In stock · ships from Knoxville
This is a reversible sleeve air spring commonly used on trailer air ride suspensions, such as Hendrickson AAT 25K, Intraax, and Van Traax systems.
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Verified fitment for 3 applications
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All confirmed applications for this part number.
Other applications
Other applications
Designed primarily for Hendrickson trailer air ride systems. The Intraax and Van Traax installations require reusing the original metal disk. May fit other trailer setups if top plate and piston dimensions match.
Part data verified against 5 catalog sources
Numbers this part supersedes or interchanges with. Showing 14 of 14.
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It supports the trailer’s weight, absorbs road shock, and helps maintain ride height by inflating and deflating as needed. You typically replace it when it leaks, cracks, or no longer holds air, causing the trailer to sag or bounce excessively. This spring replaces Hendrickson S-20901 and S-21784 and uses the Firestone 1T19FC-6 bellows.
Part Number: 8091
AIR SPRING
Unit: ea
Dealer: Knox Trailers
Compatibility, alternatives, and more
Parts commonly needed alongside suspension & steering
