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Hendrickson · Suspension & Steering
S38000
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The Hendrickson S-38000 is a ZMD (Zero Maintenance Damping) rolling-lobe air spring for Hendrickson ULTRAA-K 40K trailer air-ride slider suspensions.
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This air spring is designed specifically for Hendrickson ULTRAA-K 40K suspensions. Verify the suspension model on your trailer's data plate before ordering. When replacing the earlier S-34733 generation, you must convert all four air springs on the suspension to S-38000; do not mix generations.
Part data verified against 4 catalog sources
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It supports the trailer load and provides built-in damping, eliminating the need for separate shock absorbers. You replace it when an air spring leaks, cracks, or fails to hold pressure, or when converting an older suspension from S-34733 springs. For best ride and handling, always replace air springs in pairs or as a full axle set.
Part Number: S38000
HENDRICKSON SINGLE ROLLING LOBE PISTON AIR SPRING
Dealer: Knox Trailers
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