6 Inch Dog Bone Keel Roller

Blue Boat Rollers: Blue rollers are made from HDPE (High-Density Polyethylene), a hard and durable plastic ideal for aluminium boat hulls. They reduce friction and support heavier loads during launching and retrieval.

Red Boat Rollers: Red rollers are made from soft polyurethane. Their softer surface is perfect for fiberglass boats, helping protect the hull from scratches or wear.

Black Boat Rollers: Typically made from rubber, these are a lower-quality option. While usable with both aluminium and fiberglass hulls, rubber rollers tend to wear quickly and can mark the hull. For best results, choose blue or red based on your boat type.

There’s no exact number, as every boat and trailer setup is different. A simple rule is: the more keel rollers, the better.

Up to 70% of your boat’s weight rests on the keel, so having multiple high-quality keel rollers provides better support and stability during launching, loading, and towing.

We recommend using enough rollers to evenly support the keel along its length, especially for larger or heavier boats.

In most cases, you only need one self-centering keel roller. The unique angled design of this roller helps guide your boat into the correct position during retrieval.

This type of roller is typically installed in the central position of your trailer to assist in aligning the boat with minimal effort.

For larger boats or difficult loading conditions, a second self-centering roller may help, but it's generally not necessary. Look at our centering kits instead!

Roxom supplies a range of blue and red keel rollers, as well as wobble rollers — all built for durability and performance.

Blue Keel Rollers: Manufactured in Australia by MPQ Plastics, located on the Gold Coast.

Red Keel Rollers: Supplied from both Australian-made sources and overseas manufacturers.

Wobble Rollers: Available in two main brand names:

• Wasson – Made in Australia
• Viking – Imported from overseas

All wobble rollers, regardless of brand or colour, are manufactured using the same quality materials, ensuring consistent performance across the range.

Roxom supplies a range of blue and red keel rollers, as well as wobble rollers — all built for durability and performance.

Blue Keel Rollers: Manufactured out of HDPE Ultralene Plastic. Designed specifically for aluminium boat hulls.

Red Keel Rollers: Manufactured out of red soft polyurethane material. Ideal for use with fiberglass boat hulls.

Wobble Rollers: Manufactured similar to red soft poly rollers, Polyurethane. The profile of wobble rollers allows for use with both fiberglass and aluminium boat hulls.

Yes! You can choose your preferred bore size from the available options listed on each product page.

If the bore size you need isn’t shown, please contact us at sales@roxom.com.au — we’re happy to discuss custom options to suit your requirements.

Yes! Roxom offers custom machining for keel rollers made from HDPE, Acetal, and Nylon materials.

If you need a specific size, shape, or design, contact us at sales@roxom.com.au to discuss your custom requirements and receive a tailored quote.

If you still have questions or need help choosing the right boat trailer parts, feel free to contact our team at sales@roxom.com.au. We’re happy to assist you.