# 2890B Dunbier Black Bumper Block | Marine Trailer Part

🔧 Product Description

  

Dunbier Black Channel Bumper Block for 55mm family Internal Carrier - Part Number: 2890B

  

A moulded black channel-style bumper block designed to fit over a trailer support or guide with approximately 55mm family internal width. It creates a continuous hull-protection surface over metal guide arms, bunks or frame members.

  

⚙️ Key Features

  

• Black hull-contact surface

• Designed around an approximately 55mm family internal channel

• Cushions and separates the hull from steel support hardware

• Suitable for cut-to-length trailer-guide applications

• Marine-resistant moulded material

  

📏 Specifications

  

• Colour: Black

• Internal channel: Approximately 55mm family

• Length: Current supplied length; confirm before ordering

• Mounting hardware is not included unless stated

  

🔄 Cross Reference & Related Parts

  

• Dunbier: 2890B

• 55mm family: 2890, 2890B, 2890B-3M and 2890G

• 40mm family: Dunbier 2891B

• Rolla-arm block: Dunbier 2888

  

🚤 Trailer Compatibility & Application

  

• Suitable for correctly sized Dunbier guide, bumper and support sections

• Measure the carrier's outside dimensions and the block's internal channel before purchase

• Use only where the block provides even hull support

  

🔌 Function

  

Provides a replaceable low-friction buffer between the boat hull and trailer support structure.

  

Common signs of wear or failure:

  

• Block is split or detached

• Hull-contact face is worn through

• Material is hardened or brittle

• Fasteners are exposed

• Block no longer grips the support section

  

🛠️ Installation & Safety

  

• Cut squarely using suitable tools

• Deburr and clean the support

• Secure with recessed fasteners or the specified retention method

• Avoid joints at high-load hull-contact points

• Confirm no sharp metal remains exposed

  

📦 Condition

  

• Genuine Dunbier Marine Products part

• Brand new

• Supplied as one black bumper block

• Supplied in original or equivalent packaging

## Details

- **Price:** 65.0 AUD
- **Vendor:** Dunbier
- **Tags:** Dunbier Boat Trailers | Marine Trailer Parts & Accessories

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 65.00 AUD | In stock |

## Images

- 2890B Dunbier Black Bumper Block | Marine Trailer Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/2890b-dunbier-black-bumper-block)
> Updated: 2026-08-05