# 2962 Dunbier Knott PVC Keel Roller 12" with Alloy Sleeve | Marine Trailer Part

## 🔧 Product Description

**Dunbier Knott Graphite PVC Keel Roller 12" with Aluminium Core – Part Number: 2962**

A premium Knott 12-inch keel roller moulded from graphite-coloured non-marking PVC around a reinforcing aluminium core. The rigid core supports the load, while the PVC contact surface is designed to resist deformation, UV exposure and hull marking.

## ⚙️ Key Features

-   German-engineered Knott roller
-   Graphite non-marking PVC contact surface
-   Internal aluminium strengthening sleeve
-   Shape-retentive and resistant to water absorption
-   Suitable for white and light-coloured hulls

## 📏 Specifications

-   Overall length: Approximately 298mm
-   Centre diameter: Approximately 61mm
-   End diameter: Approximately 95mm
-   Bore: Approximately 17mm
-   Material: PVC with aluminium core
-   Approximate weight: 0.95kg

## 🔄 Cross Reference & Related Parts

-   Dunbier: 2962
-   Brand: Knott
-   Use a 16mm roller pin with suitable running clearance
-   Rubber 12-inch alternative: Dunbier 2961
-   Soft-poly 12-inch alternative: Dunbier 2940

## 🚤 Trailer Compatibility & Application

-   Suitable for keel-line support on compatible boat trailers
-   Particularly useful where a non-marking graphite roller is preferred for light hulls
-   Bracket width must accommodate the 298mm roller and end clearance

## 🔌 Function

Supports and centres the keel while the aluminium core prevents excessive roller compression under load.

## ⚠️ Common Signs of Failure

-   PVC body is cracked, gouged or separated from the core
-   Aluminium sleeve is corroded or loose
-   Bore is enlarged
-   Roller no longer turns freely
-   Hull is contacting the bracket or pin

## 🛠️ Installation & Safety

-   Support the hull before removing the existing roller
-   Use a straight 16mm pin and suitable washers
-   Set the roller height so the keel load is shared with surrounding supports
-   Confirm the roller turns without side binding
-   Rinse after saltwater launching and inspect the aluminium core periodically

## 📦 Condition

-   Brand new Dunbier Marine Products trailer component
-   Supplied as one 12-inch Knott PVC keel roller
-   Supplied in original or equivalent packaging

## Details

- **Price:** 18.5 AUD
- **Vendor:** Dunbier
- **Type:** Trailer Parts
- **Tags:** Dunbier Boat Trailers | Marine Trailer Parts & Accessories

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 18.50 AUD | In stock |

## Images

- 2962 Dunbier Knott PVC Keel Roller 12" with Alloy Sleeve | Marine Trailer Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/2962-dunbier-knott-pvc-keel-roller-12-with-alloy-sleeve)
> Updated: 2026-09-06