Firestone Air Spring 1T Reversible Sleeve, 8.1 in Compressed Length, 22 in Extended Length, Model 1T15M-8
Product Overview
Although air springs are produced in single, double and triple convoluted and reversible sleeve styles, only those manufactured by Firestone Industrial Products Company bear the trademark “Airide™.” Airide springs were pioneered and perfected by Firestone, and only Firestone offers a complete line of Airide springs, with replacement springs available for virtually every vehicular air suspension system. Today, Airide springs are used by practically all manufacturers who offer air suspension on their vehicles. While it may appear simple, an air spring is actually a highly sophisticated and complex product. Even slight changes in design, methods of construction, or materials used can make vast and significant differences in performance. It makes good sense to specify Airide springs by Firestone. That trade name on an air spring guarantees you the benefit of the very latest technical developments and improvements. It is your assurance of a product not only engineered and perfected to perform, but which also has a long history of superior performance in actual use.Air Spring, 1T Reversible Sleeve Air Spring, 8.1 in Compressed Length, 22 in Extended Length, 10.12 in Width
Features & Benefits
- Manufactured to Meet or Exceed O.E.M. Specifications in Function, Form & Fit.
- Today, Airide Springs are Used by Practically All Manufacturers Who Offer Air Ride Suspensions on Their Vehicles.
- Airide Springs Were Pioneered & Perfected by Firestone, and Only Firestone Offers a Complete Line of Airide Springs.
Specifications
| Air Inlet | 1/4 in NPT |
| Air Spring Type | 1T Reversible Sleeve |
| Application | Hendrickson 50899-1 & 2 (Mack-class 8), 57QL414M, Mack 3645Q27 |
| Bead Plate (Top) & Deflated Bellows O.D. | 9 in @ 10.12 in |
| Bellows | 1T15M-8 |
| Bottom Plate Diameter | 10 in |
| Bottom Stud Configuration | 1/2 in-13 UNC |
| Compressed Length | 8.1 in |
| Diameter | 10-1/8 in |
| Extended Length | 22 in |
| Firestone Bellows Number | 1T15M-8 |
| Piston Height | 4-27/32 in |
| Temperature | 57°C @ -54°C (134.6°F @ -65.2°F) |
| Top Bead Plate Hardware Key | Bold or Stud 1/2-13 in |
| Top Plate Diameter | 9 in |
| Weight | 16.9 lb (7.66 kg) |
| Width | 10.12 in |
| Capacity | 6795 lb-ft (at 90 psig) |
| Pressure Type | psig |
| Product Category | Air Spring |
Interchanges & Equivalent parts:
| 1R12-404 |
| 1R12404 |
| 1S12-031 |
| 1S12031 |
| 352-9375 |
| 50899002 |
| AB9375 |
| FIR9375 |
| 50899-1 |
| 508992 |
| AS9375 |
| FI W01 358 9375 |
| FSIW013589375 |
| GTK-358-9375 |
| RC AS9375 |
| 1S12-030 |
| 8519 |
| W013589375 |
| 1000-AS9375 |
| 3040-W013589375 |
| 3645Q27 |
| 364SQ27 |
| 57QL 414M |
| 9 10-17.5 P 440 |
| 9 10-17.5 P 451 |
| REAW013589375 |
| TAS9375 |
| TR9375 |
| TWDW013589375 |
| W01-455-9375 |
| 1R12-488 |
| 1R12488 |
| 25158024 |
| 50899-001 |
| 50899-002 |
| 50899-002L |
| 50899-2 |
| 50899001 |
| 50899002L |
| 508991 |
| 57QL414M |
| 68616 |
| 9 10-18.5 P 451 |
| SC2773 |
| W01-358-9375 |




















