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Automann · Suspension & Steering
AB1DK28U1-8539
In stock · ships from Knoxville
This is a rolling lobe air spring (air bag) used in the rear suspension of heavy-duty trucks and trailers.
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Verified fitment for 2 applications
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All confirmed applications for this part number.
Other applications
Other applications
Commonly used on many late-model heavy-duty truck and trailer air-ride suspensions. The top plate has 2 bolt holes on a 5.5-inch center-to-center diameter, and the bottom has a single stud with a composite piston. Always verify dimensions against your existing spring before ordering.
Part data verified against 5 catalog sources
Numbers this part supersedes or interchanges with. Showing 16 of 21.
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It replaces the metal spring in an air-ride system, using compressed air to support the vehicle's weight and absorb road shocks for a smoother ride. You typically replace it when the rubber bellows crack, leak air, or the internal piston fails, causing the suspension to sag or the compressor to run constantly. This model features a two-stud top plate, a single-stud composite bottom piston, and fits many common trailer and drive-axle applications.
Part Number: AB1DK28U1-8539
AIR BAG 1R13-188
Vendor: Automann
Dealer: Knox Trailers
Compatibility, alternatives, and more
Parts commonly needed alongside suspension & steering
