1312 Dunbier Wind-Up and Swing-Up Jockey Wheel 250 x 85 Solid Wheel | Marine Trailer Part

🔧 Product Description

Genuine Dunbier Marine Products Galvanised Wind-Up Swing-Up Jockey Wheel with 250 × 85mm Wheel – Part Number: 1312

A large galvanised swing-up jockey wheel for marine trailers, fitted with a steel-centre wheel and solid rubber tyre measuring approximately 250 × 85mm. The wind-up mechanism adjusts the coupling height, while the swivel bracket allows the complete leg to fold clear for road travel.

⚙️ Key Features

• Wind-up screw adjustment
• Swing-up storage position
• Large steel-centre solid-rubber wheel
• Galvanised marine-trailer finish
• Suitable for medium and heavy boat-trailer drawbar loads within its rating

📏 Specifications

• Wheel size: Approximately 250 × 85mm
• Wheel type: Steel centre with solid rubber tyre
• Static/lift capacity: Approximately 350kg
• Mounting type: Swing-up swivel bracket
• Finish: Galvanised

🔄 Cross Reference & Related Parts

• Replacement wheel: Dunbier 1352
• Related older/companion jockey-wheel references: Dunbier 1270 and 1310
• Smaller 200 × 60mm replacement-wheel family: Dunbier 1351

🚤 Compatibility & Application

• Boat trailers with sufficient drawbar space for the large wheel and swing arc
• Supported drawbar load must remain within the jockey-wheel rating
• Use on firm ground and avoid lateral shock loading
• The wheel must be wound fully up and locked in the travel position before towing

🔌 Function

Supports the trailer drawbar while uncoupled, adjusts the coupling to tow-ball height and permits short-distance manual positioning.

⚠️ Common Signs of Failure

• Swing bracket or locking pin does not engage securely
• Wheel tread is split, chunked or badly flat-spotted
• Steel wheel centre is bent or corroded
• Wind-up screw becomes stiff, skips or fails to hold height
• Mounting bracket moves or distorts under load

📦 Condition

• Genuine Dunbier Marine Products part
• Brand new
• Supplied in original or equivalent packaging