Manutec Boat Trailer 12″ Black Rubber Keel Roller with Galvanised Dual Bracket – 26mm Bore (SKU: BDA059)

The Manutec BDA059 is a heavy-duty 12″ black rubber keel roller kit designed for serious support and stability on boat trailers.
With a wide 300mm roller and dual galvanised bracket, this setup is ideal for larger fiberglass boats needing reliable keel alignment and impact absorption.

The roller is made from durable 85 DURO black rubber, which provides excellent shock absorption and prevents hull damage during launch and retrieval.
The 26mm bore is built to accommodate 20mm spindles, making it compatible with standard heavy-duty trailer setups.

What sets this unit apart is the dual-bracket support design, which distributes load across a wider surface area. This minimises roller stress, improves keel alignment, and increases the life span of your trailer components.

Specifications:

Whether you’re upgrading or replacing your old roller system, the BDA059 is a reliable partner for launching big boats with less worry and more control.

Frequently Asked Questions

• What size spindle does it suit?
  This roller has a 26mm bore, made to fit 20mm spindles.
• Is the dual bracket included?
  Yes, the kit includes a galvanised dual roller support bracket for extra stability.
• What boats is this roller good for?
  It’s best suited for large fibreglass boats due to its size and strength.
• Does the rubber leave marks?
  Black rubber can leave marks on some light-coloured hulls—consider poly if non-marking is a must.

Is This the Right Kit for You?

Recommended For:

• Owners of larger fibreglass boats
• Trailers with 20mm spindle setups
• Users needing extra keel support and load distribution
• Marine environments where bracket corrosion resistance is important

Not Recommended For:

• Small boats, tinnies or kayaks (overkill)
• Situations where non-marking is absolutely required

Installation Tips:

1. Secure the dual bracket to your trailer’s keel frame using bolts or clamps.
2. Insert the roller onto a 20mm spindle through the 26mm bore.
3. Use spacers or washers if needed for central alignment.
4. Ensure free roller rotation and firm mounting before use.