1294 Dunbier H3942 Mackay Knott Swing-Up Jockey Wheel Heavy-Duty TK57-210/75m | Marine Trailer Part

🔧 Product Description

Dunbier Knott TK57 Heavy-Duty Side-Wind Swing-Up Jockey Wheel 210 × 75mm - Part Number: 1294

A premium heavy-duty Knott TK57 swing-up jockey wheel with a broad 210 × 75mm wheel for improved support on softer surfaces. Dunbier and Mackay catalogue a 545kg capacity and 255mm lift height; current Knott TK57 versions may be marked 500kg static load, so the supplied unit's rating governs.

⚙️ Key Features

• Knott TK57 side-wind mechanism

• Wide 210 × 75mm wheel

• Swing-up travel bracket

• Galvanised finish for marine trailer use

• Broad wheel reduces ground pressure compared with the 50mm version

📏 Specifications

• Catalogue capacity: 545kg Dunbier/Mackay

• Current Knott family static rating may be 500kg depending version

• Lift height: Approximately 255mm

• Wheel size: 210 × 75mm

• Outer tube diameter: TK57 57mm family

🔄 Cross Reference & Related Parts

• Dunbier: 1294

• Mackay: H3942

• Knott family: TK57 Premium

• Replacement handle: Dunbier 1295

• Replacement wheel: Dunbier 1296

• Replacement cap: Dunbier 1291

• Related gear components: Dunbier 1280, 1301 and 1302 where compatible

🚤 Trailer Compatibility & Application

• Suitable for medium and heavy trailers within the permanent rating

• Wide wheel is useful on gravel, compacted dirt and uneven launch areas

• Confirm sufficient clearance for the 75mm wheel when swung up

🔌 Function

Supports and height-adjusts the trailer drawbar and assists manual positioning on firm surfaces.

Common signs of wear or replacement:

• Wheel hub or tread is damaged

• Handle gear skips under load

• Swing lock is loose

• Tube bends or develops excessive play

• Grease is contaminated by water because the cap is missing

🛠️ Installation & Safety

• Mount to a structurally sound drawbar with correct hardware

• Use wheel chocks before uncoupling

• Retract and lock the assembly before road travel

• Maintain screw and gear lubrication

• Do not use as an axle jack or permanent support stand

📦 Condition

• Brand new Dunbier Marine Products trailer component

• Supplied as one complete Knott TK57 210 × 75mm heavy-duty jockey wheel

• Supplied in original or equivalent packaging