The Ø110 × 73 mm support roller is a key part of the trailer’s wobble assemblies that support the boat from the sides. These rollers are installed in pairs on a special bracket and work together as a set – they cradle the hull, being able to tilt (wobble) and rotate slightly to follow the curve of the boat. This allows automatic adjustment to the hull’s shape as the boat is loaded onto the trailer and ensures the boat ends up centered and stable.
The roller is made from a tough plastic compound in grey color, which is resistant to wear and weather. The material will not crack under UV exposure and won’t soften or degrade when in contact with fuels or oils – an important quality since rollers often come into contact with engine oil or other contaminants. The roller’s surface is smooth and rounded, which protects the boat’s gelcoat or paint from damage: even if the hull rubs against it, it won’t scratch the finish. The grey color also means it won’t leave noticeable marks on the hull.
With a diameter of Ø110 mm, this roller provides a large contact area with the boat, helping to distribute the load more evenly. The 73 mm width adds to the stability of the support – the roller is wide enough not to “dig in” at one point on the hull, even for heavier boats. The center bore is Ø22 mm, and often the manufacturer includes a plastic bushing that can be inserted to allow mounting on a thinner shaft (for example Ø16 mm, which is common on many brackets). This makes the roller versatile and compatible with different setups.
- Dual Support: intended to be used in twos – a pair of these rollers works together to support one side of the boat. A full wobble assembly uses 4 rollers in total (2 per side of the trailer)
- Self-Centering Action: the wobble mechanism with these rollers lets the boat find its center automatically – the rollers tilt and adjust as the hull settles into place on the trailer
- Durability: the plastic material withstands repeated use – these rollers can spin and take bumps during loading hundreds of times without cracking or deforming
- Versatility: the Ø22 mm bore with optional bushing ensures these rollers can be mounted on both larger 22 mm shafts and the more common 16 mm shafts, depending on your trailer’s hardware
- For Larger Boats: this type of support roller is typically used on trailers carrying medium to large boats (e.g., 5+ meters), where additional side support is critical for the boat’s safety and stability on the trailer



