3108 Dunbier Glider After Market Kit Suits 50 x 50 Cross Members | Marine Trailer Part

🔧 Product Description

Dunbier Glider Self-Centring Retrofit Kit for 50 × 50mm Cross Members – Part Number: 3108

A complete Dunbier aftermarket Glider kit designed to improve boat retrieval on trailers fitted with 50 × 50mm cross members. The angled low-friction bumper blocks create a wide entry funnel that redirects the hull toward the trailer centreline.

⚙️ Key Features

• Self-centring retrofit system
• Designed for 50 × 50mm cross members
• Low-friction grey angle-cut guide blocks
• Adjustable galvanised mounting legs and slide clamps
• Display-boxed kit for installation on many boat trailers

📏 Specifications

• Cross-member size: 50 × 50mm
• Current 2023/24 catalogue kit contents: 2 × Dunbier 3250 support legs
• Current kit contents: 4 × Dunbier 3252 slide mounts/clamps
• Current kit contents: 2 × Dunbier 3105 grey 500mm angle-cut glider blocks
• Roller rail and keel rollers are not included

🔄 Cross Reference & Related Parts

• Dunbier: 3108
• Glider block: Dunbier 3105
• Cross-member clamps: Dunbier 3252
• Alternative cross-member kit: Dunbier 3108 or 3109 as applicable
• Legacy catalogue illustrations may show a different support-leg count; verify the current packaged contents

🚤 Trailer Compatibility & Application

• Suitable for many roller and bunk trailers with the specified rectangular cross-member size
• The boat hull must be suitable for contact with the low-friction glider blocks
• The kit supplements rather than replaces correctly adjusted keel and side support

🔌 Function

Creates a tapered rear guide that pushes an off-centre hull toward the keel line during retrieval.

⚠️ Common Signs of Failure

• Blocks are cracked or worn
• Clamps shift under hull load
• Hull contacts fasteners or metal brackets
• Guides are set too narrow or too high
• Boat remains off-centre because the system is unevenly adjusted

🛠️ Installation & Safety

• Measure the cross member before selecting the kit
• Install the guide blocks symmetrically
• Keep all fasteners below the hull-contact surface
• Check for strake, chine and transducer clearance
• Ramp-test and gradually fine-tune the settings

📦 Condition

• Brand new Dunbier Marine Products trailer component
• Supplied as one complete Glider retrofit kit for 50 × 50mm cross members
• Supplied in original or equivalent packaging