# 3328 Dunbier Galvanised SR Cross Member 50 x 50 x 1625mm | Marine Trailer Part

## 🔧 Product Description

**Dunbier Galvanised Supa-Rolla Crossmember 50 × 50 × 1625mm – Part Number: 3328**

A replacement galvanised straight Supa-Rolla chassis crossmember measuring 50 × 50mm in section and approximately 1625mm overall. It spans the trailer side frames, supports roller or pad hardware and helps maintain chassis alignment under the boat.

## ⚙️ Key Features

-   Straight Supa-Rolla profile
-   50 × 50mm structural section
-   Approximate overall width: 1625mm
-   Hot-dip galvanised finish
-   Suitable for replacement or trailer refurbishment
-   Provides mounting support for roller, pad and suspension-related hardware as configured

## 📏 Specifications

-   Section: 50 × 50mm
-   Overall width: 1625mm
-   Profile: straight Supa-Rolla
-   Finish: galvanised
-   Mounting holes and brackets must match the trailer

## 🔄 Cross Reference & Related Parts

-   Dunbier: 3328
-   Related width/section alternative: Dunbier 3326
-   Rear swing members: Dunbier 3343, 3343W, 3344 and 3345
-   Supa-Rolla assemblies: Dunbier 3330–3342

## 🚤 Trailer Compatibility & Application

-   Suitable for Dunbier trailers using the matching frame width and crossmember section
-   Roller brackets, spring hardware and frame attachment points must align with the original trailer
-   Not interchangeable solely by overall width; profile and mounting locations must also match

## 🔌 Function

Ties the trailer side frames together and carries hull-support hardware across the chassis.

## ⚠️ Common Signs of Failure

-   Crossmember is bent or twisted
-   Deep corrosion or perforation is present
-   Mounting holes are elongated
-   Welds or bracket interfaces are cracked
-   Hull-support alignment cannot be restored

## 🛠️ Installation & Safety

-   Support and unload the trailer structure before removal
-   Measure frame width, section and hole centres before installation
-   Use correctly rated U-bolts, brackets or welded mounts
-   Protect drilled or cut surfaces against corrosion
-   Professionally inspect the chassis after impact damage

## 📦 Condition

-   Genuine Dunbier Marine Products part
-   Brand new
-   Supplied as one 1625mm galvanised trailer crossmember
-   Supplied in original or equivalent packaging

## Details

- **Price:** 293.5 AUD
- **Vendor:** Dunbier
- **Type:** Trailer Parts
- **Tags:** Dunbier Boat Trailers | Marine Trailer Parts & Accessories

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 293.50 AUD | In stock |

## Images

- 3328 Dunbier Galvanised SR Cross Member 50 x 50 x 1625mm | Marine Trailer Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/3328-dunbier-galvanized-sr-cross-member-50x50x1625mm)
> Updated: 2026-09-06