3110 Dunbier R2273GK Mackay Rolla-Matic Quad Including 40mm Square Tube Leg | Marine Trailer Part
3110 Dunbier R2273GK Mackay Rolla-Matic Quad Including 40mm Square Tube Leg | Marine Trailer Part
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🔧 Product Description
Dunbier Quad Rolla-Matic Two-Way Swivel Assembly with 40mm Leg – Part Number: 3110
A galvanised Dunbier Rolla-Matic hull-support assembly fitted with four grey wobble rollers. The pivoting roller arms follow the hull surface and distribute weight across multiple contact points while allowing the boat to roll during launch and retrieval.
⚙️ Key Features
- Includes four grey plastic wobble rollers
- Galvanised pivoting support assembly
- quad two-way swivel support
- Two-way articulation allows the rollers to conform to the hull
- Includes 40mm square support leg
📏 Specifications
- Roller quantity: four
- Support leg: 40mm square tube
- Approximate roller-arm span: quad two-way swivel support
- Replacement standard grey roller: Dunbier 2969
- Mounting clamp must match the trailer cross member
🔄 Cross Reference & Related Parts
- Dunbier: 3110
- Mackay: R2273GK
- 20mm-leg double assembly: Dunbier 3100SQ
- 40mm-leg double assembly: Dunbier 3100
- No-leg double assembly: Dunbier 3102
- Wide double assembly: Dunbier 3103
- Quad assembly: Dunbier 3110
🚤 Trailer Compatibility & Application
- Suitable for Dunbier Rolla-Matic, Supa-Rolla and compatible trailer support systems
- Roller hardness and position must suit the hull material and shape
- Use the correct Dunbier mount for 50 × 50, 76 × 50 or 102 × 50mm cross members
🔌 Function
Supports the lower hull on multiple pivoting rollers, allowing the assembly to equalise load as the hull shape and angle change.
⚠️ Common Signs of Failure
- Pivot arms seize or have excessive play
- Rollers are cracked, flat-spotted or worn
- Support leg is bent
- Assembly no longer shares load evenly
- Mounting clamp moves on the cross member
🛠️ Installation & Safety
- Support the boat before loosening the assembly
- Set both sides to equal height and angle
- Keep rollers clear of chines, strakes and fittings
- Tighten pivot and clamp hardware while preserving intended articulation
- Recheck hull support after launching and retrieving the boat
📦 Condition
- Brand new Dunbier Marine Products trailer component
- Supplied as one complete Rolla-Matic assembly with support leg
- 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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