Restore critical tracking alignment and eliminate suspension walk on your trailer with the ATRO PB57-21149 Premium Polyurethane Pivot Bushing. Proudly Made in the USA, this heavy-duty suspension bushing is engineered specifically to replace vulnerable, short-lived factory rubber components on high-mileage vocational fleets, commercial trailers, and over-the-road rigs.
Standard rubber bushings endure punishing multi-axis twisting and massive impact loads, causing them to quickly tear, soften, and deform under heavy payload shifting. When rubber components degrade, the suspension shifts out of square, leading to accelerated tire wear, trailer walk, and tracking issues. ATRO's proprietary polyurethane compound is chemically engineered to absorb extreme structural pressure without collapsing, cracking, or taking a permanent compression set. Additionally, it is entirely immune to under-chassis grease, motor oils, road salt, and harsh winter de-icing fluids. Engineered specifically for Neway AR and RL Series trailer suspensions, this bushing ensures true alignment, minimal maintenance, and an extended service lifetime.
High-Durometer Polyurethane: Engineered to handle massive load distribution and severe pivoting forces without the crushing or walking common to rubber.
Maintains Axle Tracking: Tightens up excessive play within the main pivot joint to keep tandem trailer axles tracking straight, significantly lowering rolling resistance and uneven tire scrubbing.
Chemical & Environmental Immunity: 100% resistant to breakdown or softening caused by chassis lubricants, shop grease, diesel fuel, and salted road spray.
Proudly Made in the USA: Manufactured to exact heavy-duty vocational tolerances for dependable, fleet-grade structural integrity.
| Specification | Details |
|---|---|
| Manufacturer | ATRO Engineered Systems |
| ATRO Part Number | PB57-21149 |
| Industry Cross Ref | 321-231U / 321-231 |
| UPC Code | 751354029161 |
| Material | Premium Heavy-Duty Polyurethane |
| Component Type | Suspension Pivot Bushing |
| Inner Sleeve Length | 5" |
| Bushing Body Length | 4.5" |
| Inside Diameter (ID) | 1-1/8" |
| Outside Diameter (OD Ref) | 2-13/16" |
| Country of Manufacture | United States (USA) |
| Category | Suspension |
| Quantity Per Vehicle | 2 |
| Shipping Weight | 2.57 lbs |
This premium polyurethane pivot bushing is engineered to fit the following heavy-duty trailer applications:
Neway Suspension Models: AR90, AR92, AR93, ARU92, and ARU93 Series
Neway Trailer Series: RL196 and RL228 Configurations
This premium polyurethane component serves as a direct performance replacement or interchange for the following OEM and aftermarket part numbers:
TRP Parts: TRB57030 (Exact Direct Cross Match)
Gaff: GAFF14533 (Exact Direct Cross Match)
Dayton Parts: 321-231U, 321-231
Holland / Neway: 90008149, 900 08 149
Automann: TRB5703
Freightliner: HLD90008149, WCM11223
International / Navistar: 2507718C1, 90008149
Mack: 5462-11223
Volvo: WCM11223, NEW90008149
Sterling Truck: WCM11223, HLD90008149
Aurora Trailer: NEW900-08-149
Stoughton: NW900-08-149
Wabash: NEW900-08-149
Euclid / Meritor: E-4410A, E7444, E4410A
Dyco: D448, DT1501
Flagg: N124
Application Tip: This package includes 1 heavy-duty polyurethane pivot bushing. A standard commercial layout typically requires a quantity of 2 pivot bushings per vehicle to complete a full suspension overhaul. Always verify your inner sleeve length (5") and inside diameter (1-1/8") prior to checkout. For the complete companion service hardware kit, look up ATRO part number PB57-36300.
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
