7" X 4" Boat Trailer Roller Assembly with 1/2 Inch Shaft Bow Stop

7" X 4" Boat Trailer Roller Assembly with 1/2 Inch Shaft Bow Stop – Fits Multiple Trailer Brands

This versatile bow roller assembly is designed for boat trailers equipped with a 1/2-inch mounting shaft. Made from durable, non-marking polyurethane, it provides gentle yet firm support for your boat's bow during loading and trailering. Its robust construction ensures long-lasting resistance to sunlight, chemicals, and water.

This part is a direct replacement for several common bow rollers, offering a reliable fit and function for compatible trailer setups.

• Designed for trailers requiring a 1/2-inch diameter mounting shaft/bolt.
• Constructed from durable, non-marking polyurethane (PU) that protects the boat's hull from scuffs and damage.
• Simple bolt-on installation makes for a straightforward replacement process.

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across aftermarket brands.

Compatible Applications

Confirm your trailer specifications in the table below.

Technical Specifications

Package Contents

• 1 x Bow Roller (7" x 4")
• 2 x End Bells
• 1 x Bolt with Washer

Installation Guide

1. Ensure the boat is properly secured off the trailer and that the trailer is on a level, stable surface before beginning.
2. Loosen and remove the nut and bolt securing the existing bow roller assembly. You may need a wrench and socket.
3. Slide the old roller, end bells, and any washers off the mounting shaft. Clean the shaft of any debris or rust.
4. Place the new bow roller between the mounting brackets, aligning its center hole with the holes on the bracket.
5. Insert the new 1/2-inch bolt through the brackets and roller, adding the end bells on each side where applicable.
6. Securely fasten the washer and nut, ensuring the roller spins freely but has no excessive side-to-side movement.

Troubleshooting & FAQ

Q: How do I confirm this roller will fit my trailer?
A: This assembly is designed for boat trailer brackets that accept a 7" x 4" roller and use a 1/2-inch diameter shaft or bolt. Measure your existing setup to ensure these dimensions match. The center hole of the roller itself is 17mm (0.67 in) to accommodate the shaft.

Q: What is the benefit of the polyurethane material?
A: The polyurethane (PU) material is engineered to be non-marking, meaning it won't leave scuffs or scratches on your boat's hull. It is also highly resistant to damage from UV sunlight, saltwater, and chemicals, giving it a longer service life than traditional rubber rollers.

Q: When should I replace my bow roller?
A: Inspect your bow roller for signs of degradation, such as deep cracks, flat spots, or chunking. A worn-out roller can fail to support the bow correctly, potentially leading to hull damage. We recommend replacing it as soon as significant wear is visible.

Q: OEM vs. Aftermarket?
A: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.

Q: How fast do you ship and how much does it cost?
A: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.

Q: What is your warranty and return policy?
A: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.

Important Notes

• Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
• This product is an aftermarket replacement part and is not an OEM component.
• Professional installation is recommended to ensure safety and optimal performance.

Why Choose JLM MARINE?

• Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
• Fast Global Shipping: Free delivery worldwide in 5–15 days.
• Direct from Manufacturer: Competitive pricing without compromising quality.