# 3290 Dunbier Roller Arm Bubble Plate, Suits Steel Roller Arms | Marine Trailer Part

🔧 Product Description

  

Genuine Dunbier Marine Products Supa-Rolla Bubble Plate for Steel Roller Arms - Part Number: 3290

  

A galvanised steel-arm bubble plate used at the pivot point of compatible Dunbier roller arms. The shaped plate allows the arms to articulate while spreading clamping load from the U-bolts.

  

⚙️ Key Features

  

• Purpose-shaped Supa-Rolla pivot plate

• Designed for steel roller arms

• Allows roller-arm articulation

• Provides U-bolt clamping and arm location

• Replacement for bent, cracked or worn original plates

  

📏 Specifications

  

• Arm material compatibility: Steel

• Plate-hole spacing and U-bolt centres must match the roller assembly

• Rubber bubble-plate strip is supplied separately where required

  

🔄 Cross Reference & Related Parts

  

• Suits steel Supa-Rolla and Rolla-Matic roller arms

• Complete arm assembly: Dunbier 3261

  

🚤 Compatibility & Application

  

• Install only with the matching arm profile and U-bolts

• Tighten evenly while preserving required arm movement

• Inspect the mating arm holes and rubber strip during replacement

  

🔌 Function

  

Locates the roller arms and permits controlled articulation so multiple wobble rollers share the hull load.

  

Common signs of wear, damage or replacement required:

  

• Plate is bent, cracked or deeply worn

• Bolt holes are elongated

• Arm movement is seized or excessively loose

• U-bolts no longer clamp evenly

• Rubber isolator is missing or deteriorated

  

📦 Condition

  

• Genuine Dunbier Marine Products part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 22.0 AUD
- **Vendor:** Dunbier
- **Tags:** Dunbier Boat Trailers | Marine Trailer Parts & Accessories

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 22.00 AUD | In stock |

## Images

- 3290 Dunbier Roller Arm Bubble Plate, Suits Steel Roller Arms | Marine Trailer Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/3290-dunbier-roller-arm-bubble-plate-suits-steel-roller-arms)
> Updated: 2026-08-05