Boat Trailer 4.5″ Black Rubber Keel Roller – Galvanised Bracket Kit, 114mm Width, 16mm Spindle Compatible (SKU: BDA004)

Boat Trailer 4.5″ Black Rubber Keel Roller – Galvanised Bracket Kit, 114mm Width, 16mm Spindle Compatible (SKU: BDA004)

The BDA004 is a solid, compact 4.5-inch black rubber keel roller designed for small to mid-sized boat trailers. With a 17mm bore and compatibility with standard 16mm spindles, this roller provides firm and steady support for fibreglass hulls.

It includes a rugged galvanised steel bracket with 50x50mm clamp-on adjusters to make installation easy and secure. Ideal for trailers where space or height is limited, or where smaller rollers offer better alignment and control.

Key Specifications:

• Model: BDA004
• Roller Width: 114mm (4.5″)
• Bore Size: 17mm (suits 16mm spindle)
• Material: UV-Stable Black Rubber
• Bracket: Galvanised Steel with 50x50mm clamp-on stem adjusters
• Recommended for: Fibreglass boats, small to mid-sized trailers

For those who want compact strength – BDA004 keeps your bow secure and stable, even on tight setups.

Frequently Asked Questions

• Q: Will this work on a single-axle trailer?
  A: Absolutely – this compact 4.5″ size is ideal for single-axle or smaller trailers.
• Q: Is it suitable for aluminium hulls?
  A: It’s better for fibreglass. Rubber rollers may mark softer aluminium – consider our poly versions.
• Q: Can the bracket fit a 60mm crossbeam?
  A: The standard kit suits 50mm x 50mm beams, but we offer other clamp sizes on request.

Is This the Right Product for You?

Recommended if you:

• Own a small to medium-sized fibreglass boat
• Need a compact roller solution for tighter trailer spaces
• Want an affordable kit with bracket and roller included

Not recommended if you:

• Are trailering a wide hull or heavy boat – go for 6″ or 8″
• Prefer soft-contact or non-marking material – check our poly rollers
• Have a custom trailer bracket system – check bore & bracket match first