Boat Trailer Keel Roller 115 x 75 mm – 17 mm Bore, Durable Keel Support

This 115 x 75 mm keel roller is designed to make launching and retrieving small boats safe and easy. Mounted at the center of your boat trailer, it supports the boat’s keel and shields the hull from damage during transport and launch. The roller fits on a standard 17 mm shaft, allowing for quick installation – an ideal replacement for worn-out or cracked keel rollers on your trailer.

It comes in two material options: a white polyurethane roller and a black rubber roller. The white polyurethane variant is elastic and non-marking, meaning it won’t leave streaks on your boat’s hull – perfect for fiberglass or gelcoat finishes where you want to avoid scuffs. The black variant is made of high-quality rubber, offering a traditional, robust solution for supporting the keel – excellent for heavier boats or where a few marks aren’t a concern. Both materials are UV-resistant and saltwater-proof, ensuring the roller will not crack or deteriorate even with continuous marine exposure.

With its 115 mm length and 75 mm diameter, this roller provides stable support and helps distribute the boat’s weight along the keel. The generous diameter allows it to roll smoothly under load, while the adequate width keeps the keel aligned on the trailer. This reduces the effort needed to winch the boat onto the trailer and helps guide it into the correct position.

Use Cases and Recommendations:

• Ideal for boats approximately 3–5 meters in length, providing reliable keel support during transport and storage
• Choose the white roller for fiberglass or light-colored hulls to avoid marks, and the black roller for heavy-duty use or when maximum durability is required
• Install this roller at the center of the trailer’s keel support; pair it with proper side hull rollers based on your boat’s size to ensure full hull stabilization
• Regularly inspect the roller shaft and brackets; replace the roller if signs of wear or flattening appear to maintain optimal hull protection