Boat Trailer Side Roller 185 x 50 mm – 17 mm Shaft, For Large Boats (White/Black)

This 185 x 50 mm side roller is designed for trailers carrying larger, heavier boats, providing crucial support to the sides of the hull. With a diameter of 185 mm, this roller has a large circumference that allows it to roll easily even under significant pressure – ideal for when your boat has substantial weight. The 50 mm width gives it a narrow profile, suitable for installation on specific brackets or frame locations where a compact roller is needed. Its hub bore is 17 mm, compatible with standard boat trailer shafts.

The roller comes in two material options to suit different needs. The white roller is made of a polyurethane elastomer that leaves no black marks on the hull – a key advantage for boats with white or light-colored gelcoat/paint. The black roller is crafted from tough rubber, built to withstand the impacts and stresses from heavy hulls without cracking or flattening. Both types are highly resistant to UV rays and seawater, preventing premature aging and ensuring reliable performance over time.

As a side support, this roller mounts to the trailer frame where it can cradle and guide the boat’s hull during loading and unloading. The large 185 mm diameter makes contact with the hull at a gentle angle and smoothly rolls as you guide the boat onto the trailer bunks. This prevents the hull from scraping or jarring against metal parts. The slim 50 mm width means the roller can be installed in tighter spots (for example, near the bow or on narrow brackets), complementing wider rollers positioned along the midsection of the trailer.

Use Cases and Recommendations:

• Suitable for large boats (approximately 6–8 meters in length) that require robust side support during loading and transport
• White polyurethane roller: excellent for yachts and boats with delicate finishes – it won’t leave marks on the hull; black rubber roller: ideal for extremely heavy boats and rough use, thanks to its superior durability
• Mount the roller at key contact points where the hull meets the trailer (such as where the boat’s side rests during loading); use in combination with additional side rollers to evenly distribute support along the hull
• Regularly inspect the shafts and fasteners – when handling very heavy loads, ensure the roller turns freely and has no cracks; replacing worn rollers promptly will keep your boat’s hull safe from damage