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(888) 312-8812 Login SignupIf your suspension isn’t up to the challenge, your truck is just dead weight on the road. The Hendrickson Air Spring delivers controlled, shock-absorbing power exactly when and where it’s needed, maintaining the same design, construction, and solidity as the original factory-installed suspension components. Carefully manufactured for Hendrickson truck and tractor air suspensions, this genuine replacement ensures top-tier performance, driver comfort, and long-term reliability. Don’t settle for non-genuine parts that compromise handling—stick with the best for a ride that’s smooth and stable. Get the Hendrickson S-23721 today.
| Bottom Plate Diameter | 10.25 in |
| Extended Height | 20.75 in |
| Piston Height | 5.59 in |
| Compressed Height | 7.40 in |
| Top Plate Diameter | 9.00 in |
| Top Mounting | Combination stud |
| Air Spring Convolutions | Single |
| Bottom Mounting | Stud |
| Air Connection Configuration | Top - Dual |
| Air Spring Type | sleeve |
| Bottom Piston/Plate Diameter | 10.25 in |
| Brand | Part Number |
|---|---|
| S-23721, HENS-23721, HDRS23721 | |
| AUTOMANN | AB1DK23J9644 |
| CONTITECH | AS9644, 64693 |
| EUCLID | FS9644 |
| FIRESTONE | W013589644 |
| HENDRICKSON | S23721, S-23721 |
| TORQUE PARTS | TR9644 |
| WORLD AMERICAN | WA01-9644C |
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