12″ Boat Trailer Black Rubber Parallel Keel Roller – 298mm Long, 75mm Diameter, 17mm Bore (SKU: PRBK300X17)

12-Inch Parallel Keel Roller – Built Tough with Solid Rubber Support

The PRBK300X17 is a serious 12″ parallel-style black rubber keel roller engineered for large boats and rugged trailer conditions. With a 298mm length and 75mm diameter, this roller offers broad keel contact and reliable centering performance.

Made from solid black rubber at 85 Duro hardness, it absorbs shock while holding firm against heavy loads. The 17mm bore provides a loose fit for standard 16mm spindles and allows the roller to rotate smoothly on the shaft during boat launch and retrieval.

Its non-tapered parallel design makes it especially suitable for flat or gently rounded keels that need consistent support across the roller’s full length.

Product Specifications

Key Advantages

• Perfect for wide or flat-bottom hulls
• Heavy-duty solid rubber construction
• UV-resistant and non-marking material
• Large surface area for even keel support

If you’re loading something big, this roller’s got your back – and your keel.

Frequently Asked Questions (FAQ)

• Q: Can I use this with a 16mm shaft?
  A: Yes, the 17mm bore is designed to fit loosely and rotate on a standard 16mm spindle.
• Q: What’s the difference between parallel and dog bone rollers?
  A: Parallel rollers maintain the same width throughout for even contact; dog bone types are tapered at the ends for keel centering.
• Q: Is this roller UV-stable?
  A: Yes, it’s made from UV-resistant marine-grade black rubber.
• Q: Can I use this with aluminium boats?
  A: Yes – it works well with both fibreglass and aluminium hulls as long as the keel fits the roller profile.

Usage Guide

To install the PRBK300X17 roller:

1. Slide onto a 16mm spindle (loose fit design).
2. Mount securely using washers or brackets.
3. Ensure the roller is centered with your keel for even support.
4. Rinse with fresh water after use to prevent rubber wear.

Evaluation & Recommendation

This roller is ideal for serious users hauling heavier boats. It’s made for consistent keel contact and long-term abuse.

Wide load? Big hull? The PRBK300X17 handles it like a champ.

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