Maximize your truck's stability and protect your suspension on harsh terrain! Install the Fortpro air spring compatible with Hendrickson PRIMAAX suspension systems. (Exact replacement for Firestone W01-358-8109 / 1T17C-8). Made of high-tenacity reinforced rubber, it absorbs the most brutal impacts from the road and maintains precise chassis leveling under maximum load. Protect your drivetrain, reduce vehicle fatigue, and get the best durability for your air suspension today!
Fortpro is a trusted leader in the development and manufacturing of premium-quality truck parts designed to meet the demands of semi-trucks and heavy-duty trucks. Renowned for innovation, durability, and reliability, Fortpro products are engineered to enhance performance, safety, and efficiency across a wide range of trucking applications.
Whether you're seeking OEM replacement parts or upgrades, Fortpro provides a diverse selection of components backed by a global reputation for quality and innovation. Trust Fortpro for the parts you need to keep your vehicles on the road longer and stronger.
Basic Part Information5 attributes
| 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/Fitment Attributes2 attributes
| Application Type | Heavy Duty Trucks, Semi-Trucks |
|---|---|
| VMRS | 016-008-000 |
Dimensional/Physical Attributes13 attributes
| 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 |
Technical/Performance Attributes3 attributes
| Air Spring Type | Rolling Lobe |
|---|---|
| Collapsed Length | 6 in. |
| Extended Length | 23 in. |
Packaging / Logistics Attributes:4 attributes
| Package Length | 12 in. |
|---|---|
| Package Width | 20 in. |
| Package Height | 13 in. |
| Net Weight | 23.09 lb. |
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.
- Automann: AB1DKM58-8109,
- CAT Trucks: 1T17C-8, 3302, FIP-101115, 9488
- Firestone W01-358-8109, W013588109, 8109,
- Hendrickson 67234-002, 67234002.
- Mack: 4000-67234002L
- Navistar: 3686258C91
- PAI Industries: 750295