# 2897G Dunbier Hard Poly Dog Bone Grey Keel Roller 6" | Marine Trailer Part

🔧 Product Description

  

Dunbier 6" Hard Poly Dog-Bone Keel Roller - Grey - Part Number: 2897G

  

A dog-bone-profile boat-trailer roller manufactured from hard grey polyurethane. The shaped or flat running surface supports and guides the hull during launch, retrieval and transport while allowing the boat to move along the trailer with less friction than a fixed bunk surface.

  

⚙️ Key Features

  

• Roller material: hard grey polyurethane

• Profile: dog-bone

• Nominal size: approximately 155mm long

• Free-rolling hull support for marine trailers

• Replacement for worn or seized Dunbier rollers

• Material hardness selected for the listed support style

  

📏 Specifications

  

• Nominal size: approximately 155mm long

• Material: hard grey polyurethane

• Shape: dog-bone

• Bore and shaft diameter must be checked against the existing installation

  

🔄 Cross Reference & Related Parts

  

• Dunbier: 2897G

• Common 6-inch shaft family: Dunbier 3000S/compatible shaft subject to bore

• Soft-poly alternative: Dunbier 2899

  

🚤 Trailer Compatibility & Application

  

• Suitable for compatible Dunbier keel, crossmember and roller-rack assemblies

• Hard-poly rollers provide low rolling resistance and durability

• Soft-poly or rubber rollers provide more cushioning but may deform under high point loads

• Roller size and position must match the hull support plan

  

🔌 Function

  

Carries and guides the hull along the trailer while rotating around the roller shaft.

  

Common signs of wear or failure:

  

• Roller is split, glazed or permanently flattened

• Bore is enlarged and the roller wobbles

• Roller does not rotate freely

• Material transfers marks or has worn through

• Hull contacts the metal bracket

  

🛠️ Installation & Safety

  

• Support the boat before removing a load-bearing roller

• Inspect the shaft for grooves, bending and corrosion

• Use correct washers, split pins or retaining clips

• Allow free rotation without excessive side play

• Reset adjacent roller heights so the hull load remains evenly distributed

  

📦 Condition

  

• Genuine Dunbier Marine Products part

• Brand new

• Supplied as one 6" hard poly dog-bone keel roller - grey

• Supplied in original or equivalent packaging

## Details

- **Price:** 12.0 AUD
- **Vendor:** Dunbier
- **Tags:** Dunbier Boat Trailers | Marine Trailer Parts & Accessories

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 12.00 AUD | In stock |

## Images

- 2897G Dunbier Hard Poly Dog Bone Grey Keel Roller 6" | Marine Trailer Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/2897g-dunbier-hard-poly-dog-bone-grey-keel-roller-6)
> Updated: 2026-08-05