# 3330 Dunbier Supa-Rolla Rear Ass 8 Rollers and Side Plates | Marine Trailer Part

🔧 Product Description

  

Dunbier Supa-Rolla Rear Eight-Roller Assembly - Part Number: 3330

  

A fully adjustable Dunbier rear hull-support assembly using steel roller arms. It is designed to conform to the hull as the boat is loaded and to distribute support over multiple wobble-roller contact points. This reference is supplied complete with grey wobble rollers and side/bubble plates.

  

⚙️ Key Features

  

• 8 roller positions

• Steel Supa-Rolla construction

• Adjustable hull-support geometry

• Suitable for launch, retrieval and road support

• Replaceable rollers, arms and mounting hardware

• Designed for Dunbier and compatible trailer layouts where dimensions match

  

📏 Specifications

  

• Assembly position: rear

• Roller count: 8

• Arm material: steel

• Supplied configuration: complete with grey wobble rollers and side/bubble plates

• Crossmember and frame mounting must be confirmed

  

🔄 Cross Reference & Related Parts

  

• Dunbier: 3330

• Steel Supa-Rolla arm assembly: Dunbier 3261

• Grey steel-trailer wobble roller: Dunbier 2969

• Large yellow alloy-trailer wobble roller: Dunbier 2968

• Related assemblies: Dunbier 3330-3342

  

🚤 Trailer Compatibility & Application

  

• Suitable for Dunbier Supa-Rolla, alloy and compatible roller trailers using the matching assembly position

• Roller-arm spacing and hull contact must be adjusted to the individual boat

• Do not mix large-alloy roller arms and steel-system components without dimensional confirmation

  

🔌 Function

  

Supports, guides and centres the hull while allowing individual rollers to pivot and share the load.

  

Common signs of wear or failure:

  

• Rollers are seized, cracked or worn flat

• Arms are bent or corroded

• Bubble plates or pivots have excessive play

• U-bolts loosen or elongate mounting holes

• Hull load is concentrated on one or two rollers

  

🛠️ Installation & Safety

  

• Support the boat before replacing a loaded assembly

• Mount to the correct crossmember section with rated U-bolts

• Set all arms so the hull is supported evenly

• Confirm rollers rotate freely and do not contact strakes incorrectly

• Recheck alignment after loading the boat

  

📦 Condition

  

• Genuine Dunbier Marine Products part

• Brand new

• Supplied as one supa-rolla rear eight-roller assembly

• Supplied in original or equivalent packaging

## Details

- **Price:** 853.0 AUD
- **Vendor:** Dunbier
- **Tags:** Dunbier Boat Trailers | Marine Trailer Parts & Accessories

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 853.00 AUD | In stock |

## Images

- 3330 Dunbier Supa-Rolla Rear Ass 8 Rollers and Side Plates | Marine Trailer Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/3330-dunbier-supa-rolla-rear-ass-8-rollers-side-plates)
> Updated: 2026-08-05