| Product Line | Suspension |
| Category Name | Air Springs and Bags |
| Part Type | Rolling Lobe Air Spring |
| Alternate Part Name | Pneumatic Spring, Suspension Air Bag, Rolling Lobe Air Spring, Air Ride Spring, Air Bag Suspension, Air Suspension Bag, Reversible Sleeve Air Spring |
| OEM Part Number | W01-358-8109 |
| Application Type | Heavy Duty Trucks, Semi-Trucks |
| VMRS | 016-008-000 |
| Material | Fiber reinforced rubber bellows |
| Air Inlet Inside Thread | 1/4-18 NPT |
| Air Inlet Outside Thread | 3/4-16 UNF |
| Body Diameter | 10.62 in. |
| Bottom Plate Alignment | Parallel |
| Bottom Plate Diameter | 10.75 in. |
| Bottom Plate Stud | 1/2-13 UNC |
| Mounting Stud Configuration - Bottom | 2 |
| Mounting Stud Configuration - Top | 1 |
| Piston Height | 6.88 in. |
| Piston Material Type | Composite |
| Top Plate Diameter | 10.38 in. |
| Top Plate Stud | 3/4-16 UNF |
| Air Spring Type | Rolling Lobe |
| Collapsed Length | 6 in. |
| Extended Length | 23 in. |
| Package Length | 12 in. |
| Package Width | 20 in. |
| Package Height | 13 in. |
| Net Weight | 23.09 lb. |
| Cross References | 3686258C91, 67234002, 8109, W01-358-8109, 1T17C-8, 1T17C8, 3302, 3686258C91, 4000-67234002L, 400067234002L, 750295, 9488, AB1DKM58-8109, AB1DKM588109, FIP-101115, FIP101115 |
| Intended Application | - Compatible with Hendrickson PRIMAAX / PRIMAAX EX heavy-duty rear air suspension systems as a direct replacement for Firestone part number W01-358-8109 / 1T17C-8. This air spring absorbs impacts from the terrain, leveling the ride height under extreme loads.
- Always compare with your OEM part number prior to purchase to confirm full compatibility.
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