Boat Trailer Roller Bracket Clamp 20x20mm Type A Adjuster for 100x50mm Rail – Galvanised (SKU: CLAMP-ADJ100X50)

The CLAMP-ADJ100X50 Boat Trailer Roller Bracket Clamp is a rugged and secure Type A clamp-on solution for mounting roller stems on larger trailer frames. Designed to suit 100x50mm rails and hold 20x20mm square posts, this bracket delivers both strength and convenience for demanding trailer setups.

• Clamp Type: Clamp-on, Type A design – no drilling required.
• Stem Compatibility: Designed for 20mm x 20mm square roller stems.
• Fits Rail Size: Securely clamps onto 100x50mm trailer rail bars.
• Finish: Hot-dip galvanised steel – resists corrosion in marine conditions.
• Weight: 1.45kg – heavy-duty steel construction for long-lasting performance.
• Ideal for: Boat trailers with large A-frames or heavy-duty rail setups.

This clamp offers a practical solution for adjustable roller positioning on big trailers. With a simple clamp-on installation, it allows for flexibility without compromising on strength or reliability. Whether you’re loading a tinny or a full-size fibreglass hull, this clamp holds the support stem firmly in place under pressure.

Frequently Asked Questions

• Q: What size post does this clamp fit?
  A: It’s made for 20mm x 20mm square roller stems.
• Q: Will it fit on any trailer rail?
  A: It’s designed specifically for 100x50mm rectangular rails. Please measure your rail before purchasing.
• Q: Does it require drilling?
  A: No, this is a clamp-on design – no drilling or welding needed.
• Q: Can it withstand saltwater?
  A: Yes, the hot-dip galvanised finish is made to resist rust and corrosion.

Is This Clamp Right for You?

This heavy-duty Type A clamp is ideal for:

• Trailers with 100x50mm frame rails.
• Users needing a secure mount for 20x20mm roller stems.
• Anyone wanting a no-drill, easy-install roller adjuster for large trailers.

Not suitable for:

• Rail sizes smaller than 100x50mm – the fit may be too loose.
• Round or oversized roller stems – this clamp is designed for square 20x20mm only.

Quick Installation Guide:

1. Position the clamp on your 100x50mm trailer rail.
2. Insert the 20x20mm post into the clamp’s slot.
3. Tighten the clamp bolts securely to lock everything in place.
4. Ensure the roller stem is upright and firmly seated before towing.