4-Inch Boat Trailer Bow Stop Roller for 1/2-Inch Shaft
4-Inch Boat Trailer Bow Stop Roller for 1/2-Inch Shaft is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
Orders are typically processed within 1–2 business days.
U.S. orders usually arrive within 6–15 days, depending on stock location and destination.
International delivery times may vary due to customs processing.
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4-Inch Boat Trailer Bow Stop Roller for 1/2-Inch Shaft
4-Inch Boat Trailer Bow Stop Roller for 1/2-Inch Shaft is backordered and will ship as soon as it is back in stock.
Product Details
This 4-inch boat trailer bow stop roller is designed for use with a winch-post assembly that uses a 1/2-inch shaft. The roller helps guide and support the boat bow during loading, unloading, and trailering.
Measure your existing roller and shaft before ordering to confirm that the replacement matches your trailer hardware.
- 4-inch bow stop roller for boat trailer applications.
- Designed for a 1/2-inch mounting shaft.
- Single replacement roller; mounting hardware and shaft are not confirmed as included.
Part Number Information
This product is a 4-inch bow stop roller for a 1/2-inch shaft. No verified OEM or manufacturer cross-reference is provided for this listing.
Technical Specs
- Product Type
- Bow Stop Roller for Boat Trailer
- Application
- Boat trailer winch-post and bow-stop assemblies
- Roller Size
- 4 inches
- Compatible Shaft Diameter
- 1/2 inch
- Product Configuration
- Single roller
What’s in the Box
- 1 x 4-inch boat trailer bow stop roller
The shaft, washers, nuts, bolts, and other mounting hardware are not confirmed as included. Reuse existing hardware only if it is in good condition and compatible with the replacement roller.
Installation Notes
- Place the trailer on a level surface and secure the boat or remove it from the trailer before beginning work.
- Measure the existing roller and verify that the winch-post assembly uses a 1/2-inch shaft.
- Remove the retaining nut, bolt, or other hardware securing the existing roller.
- Remove the old roller and inspect the shaft, washers, spacers, and fasteners for wear or corrosion.
- Position the replacement 4-inch roller on the existing shaft and reinstall the compatible hardware.
- Tighten the retaining hardware securely while allowing the roller to rotate freely without excessive side-to-side movement.
- Before launching or trailering the boat, confirm that the roller is properly aligned with the bow and that all hardware is secure.
Troubleshooting & FAQ
How do I know if this bow stop roller will fit my trailer?
Confirm that your existing roller is approximately 4 inches and that the mounting shaft is 1/2 inch in diameter. Also compare the available width and mounting arrangement before ordering.
Does this product include the shaft and mounting hardware?
This listing is for a single bow stop roller. This listing does not confirm that a shaft, washers, nuts, bolts, or other mounting hardware are included.
What should I inspect before installation?
Inspect the shaft and all retained hardware for bending, corrosion, excessive wear, or damaged threads. Replace worn hardware before using the trailer.
When should I replace a bow stop roller?
Replace the roller if it has cracks, deep grooves, flat spots, deformation, excessive looseness, or does not rotate properly on the shaft.
What can happen if the roller is the wrong size?
An incorrectly sized or poorly aligned roller may not support the boat bow correctly and can interfere with loading, unloading, or secure trailering. Verify the dimensions and shaft size before installation.
Is this an OEM replacement?
This listing does not identify an OEM manufacturer or verified OEM cross-reference for this product. Confirm the dimensions and mounting arrangement against your existing part before ordering.
Safety & Important Information
- Verify the 4-inch roller size and 1/2-inch shaft diameter against your trailer before purchase.
- Do not use damaged, bent, corroded, or improperly sized mounting hardware.
- After installation, check that the roller is aligned with the boat bow and rotates freely.
- Inspect the assembly regularly, especially before long-distance towing or after periods of storage.
- Professional installation is recommended if the winch-post assembly or mounting hardware is damaged or difficult to remove.
About Sea Sierra
- Marine Replacement Parts — Practical replacement components for boat trailer and marine applications.
- Fitment-Focused Ordering — Compare the product dimensions and mounting requirements with your existing part before purchase.
- Support — Contact customer service if you need help confirming the dimensions or installation requirements.
Payment & Security
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