Boat Trailer Smooth Wobble Roller 3″x4″ Black Poly 20mm Bore (SKU: WRSBK90X100X20)

WRSBK90X100X20 – 3″x4″ Smooth Black Polyurethane Wobble Roller is a compact and reliable roller designed for boat trailers with 20mm shaft arms. It offers durable performance and smooth operation during launching or retrieving your boat.

The roller is made from non-marking black polyurethane with a sleek smooth surface that protects delicate hull coatings from scuffs and pressure marks. It is especially suitable for aluminium or fiberglass boats where maintaining a clean finish is essential.

Key Features:

• Size: 3″ Width x 4″ Height
• Bore Size: 20mm – fits standard roller arm shafts
• Material: Black Smooth Polyurethane
• Non-marking and UV-resistant for marine conditions
• Lightweight and corrosion-free

This roller suits wobble arm setups where a smooth gliding surface is preferred for easier centering and reduced hull drag. Whether you’re trailering a small runabout, tinny, or ski boat, this roller ensures gentle contact and reliable support.

FAQ

Q: Will this roller leave marks on my boat?

A: No, it’s made from non-marking black polyurethane, safe for all hull types.

Q: Does it fit a 20mm shaft?

A: Yes, the bore is 20mm and designed for standard wobble roller arms with matching diameter.

Q: What type of boats is this best for?

A: It’s perfect for lightweight aluminium or fiberglass boats that require smooth and scratch-free support.

Q: Is this roller suitable for saltwater use?

A: Absolutely. It’s UV-stable and built from materials that won’t corrode or degrade in marine environments.

Evaluation & Recommendation

This 3″x4″ black poly roller with a 20mm bore is well-suited for:

• Small to medium-sized boats on single or tandem axle trailers
• Users wanting a smooth roller to reduce scuffing or paint wear
• Boat trailers used in saltwater or UV-prone conditions

Installation Tips:

• Match the bore to a 20mm shaft for secure fitment
• Use retaining hardware (collars or pins) to lock the roller in place
• Inspect rollers regularly to ensure even wear and structural integrity

If you’re unsure whether a smooth or ribbed roller best fits your boat type, reach out and we’ll help you find the perfect match for your setup.