GHmarine Boat Trailer Bow Roller Assembly 4" Non-Marking Polyurethane, 1/2" Stainless Shaft

GHmarine 4" Boat Trailer Roller Bow Stop Assembly is a durable, non-marking polyurethane bow roller with a 1/2" mounting shaft that cushions your boat during loading and towing.

This compact bow roller is built to protect fiberglass, gelcoat and painted hulls while making trailer launches and retrievals smoother. The assembly includes the 4" mid-roller, two bell pieces and a stainless-steel 1/2" bolt, offering a ready-to-install unit that resists rust and leaves no flat spots on your boat’s contact areas. Designed for easy fitment onto common trailer tongues, it’s a practical upgrade for owners who want reliable bow support without abrasive contact.

How does this bow roller protect my boat during launching?

The roller’s non-marking polyurethane surface absorbs impact and slides smoothly against hulls, minimizing scuffs during wet loading and winching. Its rounded profile reduces pressure points and helps the bow transition cleanly over the trailer V. The included bells stabilize the roller and keep it centered under load.

• Non-marking polyurethane resists abrasion and prevents hull rub.
• 4" diameter roller distributes contact to reduce pressure.
• Bell ends keep the roller aligned for smoother centering.
• Stainless 1/2" bolt fastens securely and resists corrosion.

What are the installation steps and mounting requirements?

Mounting is straightforward: slide the roller assembly into your bow stop bracket and secure it with the supplied 1/2" stainless steel bolt. The assembly is designed for typical trailer bows and requires a 1/2" diameter mounting hole. No special tools or fabrication are usually necessary for standard setups.

• Requires a 1/2" mounting hole for the supplied stainless bolt.
• Overall assembly width is approximately 7", roller diameter 4" at center.
• Includes two bell end pieces for containment and alignment.
• Quick hand-tighten and torque to trailer bracket specs for safety.

Will this roller resist corrosion and deformation over time?

The roller uses solid polyurethane that resists flat spots and stays flexible across seasons, while the included bolt is stainless steel to limit rust on metal components. Together they deliver long-lasting performance in fresh and saltwater conditions when rinsed and maintained. Routine inspection will help ensure continued smooth operation.

• Solid polyurethane construction resists flat-spotting and tearing.
• Stainless-steel bolt minimizes corrosion on exposed hardware.
• Simple rinsing after saltwater use extends life expectancy.
• CE and quality certifications indicate manufacturing standards.

How does this part fit into common trailer setups?

This bow stop roller is compatible with most single- and double-roller trailer setups and can replace worn or marking center rollers. Its compact profile and standard 1/2" shaft make it a convenient retrofit for many tongue brackets, winch stands and bow stop arms. It helps boats seat consistently against the trailer and reduces jolting during transport.

• Works as a replacement for center bow rollers on many trailers.
• Compact 7" overall width fits tight bow stop brackets.
• Standard 1/2" bolt simplifies swap-out installations.
• Designed to pair with common trailer bell assemblies and mounts.

Who is this for: Boat owners, trailer service shops and DIY enthusiasts who want a reliable, non-marking bow roller that’s easy to install and built to withstand marine conditions. If you’re replacing a worn roller or upgrading to a softer, hull-friendly contact surface, the GHmarine 4" polyurethane bow roller offers a practical, corrosion-resistant solution that balances protection, longevity and straightforward mounting.