3345 Dunbier Swing x Member 75mm Suits Supa and Rollamatic Models | Marine Trailer Part
3345 Dunbier Swing x Member 75mm Suits Supa and Rollamatic Models | Marine Trailer Part
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🔧 Product Description
Dunbier Supa-Rolla/Rollamatic Rear Swing Crossmember – Wide Frame – Part Number: 3345
A galvanised pivoting rear crossmember for wide-frame Supa-Rolla and Rollamatic trailers. The swing action allows the rear roller assembly to follow the hull during launch and retrieval, while the frame width and tube section maintain the correct alignment for the trailer family.
⚙️ Key Features
- Pivoting rear crossmember
- Galvanised structural-steel construction
- Frame width: approximately 1725mm
- Section: 75 × 50mm
- Accepts compatible rollers and adjustable stop
- Replacement for the factory rear swing member
📏 Specifications
- Section: 75 × 50mm
- Frame width: 1725mm
- Application: wide-frame Supa-Rolla and Rollamatic trailers
- Adjustable stop: included on 3344/3345 or used separately as configured
🔄 Cross Reference & Related Parts
- Dunbier: 3345
- Adjustable stop: Dunbier 3341
- Standard/wide companion references: 3343/3343W and 3344/3345
- Roller assemblies: Dunbier 3330–3342
🚤 Trailer Compatibility & Application
- Suitable for wide-frame Supa-Rolla and Rollamatic trailers
- Pivot, stop and roller hardware must match the original installation
- Standard and wide-frame members are not interchangeable
🔌 Function
Allows the rear hull-support system to pivot during loading while tying the rear chassis rails together.
⚠️ Common Signs of Failure
- Member is bent or twisted
- Pivot holes are elongated
- Galvanising is lost with deep corrosion
- Swing action binds
- Roller assembly no longer aligns with the hull
🛠️ Installation & Safety
- Support the trailer and boat before removing the pivot hardware
- Replace worn bushes, bolts and stop components
- Set the crossmember square to the chassis
- Confirm free swing without tyre or frame contact
- Tighten all retaining hardware and secure pins
📦 Condition
- Genuine Dunbier Marine Products part
- Brand new
- Supplied as one galvanised rear swing crossmember
- Supplied in original or equivalent packaging
Shipping & Delivery
Shipping & Delivery
Flat-rate shipping Australia-wide — $14.99 per order, no matter how many parts you add. Orders dispatch from our Kadina, South Australia store. Need it urgently or want to collect in person? Call us on 0412 532 984 before ordering.
Returns & Warranty
Returns & Warranty
14-day change-of-mind returns — if it's not right or you ordered the wrong part, send it back within 14 days in new, unused condition for a refund or exchange. Manufacturer warranties apply to new parts. Full details in our Refunds & Returns policy.
Not sure this fits?
Not sure this fits?
Ask us before you buy — we check part numbers and fitment every day. Call 0412 532 984 (Mon–Fri 8.30am–4.30pm) or message us through the contact page with your engine or vehicle details.
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