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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 |
|---|---|
| Automann | AB1DK23J9644 |
| Firestone | W013589644 |
| Hendrickson | S23721 |
| Euclid | FS9644 |
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