8″ Boat Trailer Black Rubber Keel Roller – 204mm Long, 75mm Diameter, 20mm Bore, Parallel Type (SKU: PRBK200X20)

8-Inch Parallel Keel Roller – Black Rubber, 20mm Bore

The PRBK200X20 is a heavy-duty 8-inch parallel-style keel roller designed for trailers using 19–20mm spindles. With a 204mm length and 75mm diameter, it provides reliable, flat-profile keel support for fibreglass and aluminium boats.

Constructed from UV-stable solid black rubber, this roller offers 85 Duro hardness for maximum strength under load. It’s non-marking and built to withstand sun, salt, and heavy marine use.

Ideal for trailers requiring consistent, straight-line support and users who prefer a no-nonsense, low-maintenance keel roller that just gets the job done.

Product Specifications

Why It Works

• Reliable support for mid-sized boat hulls
• Perfect for 19–20mm shaft trailer setups
• Flat, even keel contact – no centering effect
• Australian-grade UV resistance and durability

Sydney-tough and straight to the point – this roller rolls with muscle and grace.

Frequently Asked Questions (FAQ)

• Q: Can I use this with a 19mm shaft?
  A: Yes, the 20mm bore is designed for a loose but workable fit on 19mm spindles.
• Q: Does this roller help with centering the boat?
  A: No, it’s a parallel roller — designed for steady support, not auto-centering.
• Q: Is it UV resistant?
  A: Absolutely. The black rubber is UV-stable and perfect for Aussie summers.
• Q: What kind of hulls is this best for?
  A: Works best with flat-bottom or shallow-curved fibreglass or aluminium hulls.

Usage Guide

Installing the PRBK200X20:

1. Slide the roller onto a 19mm or 20mm shaft.
2. Secure it using locking pins or end caps between brackets.
3. Ensure the roller is properly aligned with the keel path.
4. Rinse thoroughly after saltwater exposure for longer life.

Evaluation & Recommendation

A smart option for serious trailers that need even keel contact over a wider roller. No centering frills, just smooth, strong rolling.

Keep it straight, keep it strong – this is parallel performance made simple.

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