Bow Roller Assembly – Fits Multiple Trailer Brands (Replaces GluckMarine, MARKGOO, JFATXTT)
Bow Roller Assembly – Fits Multiple Trailer Brands (Replaces GluckMarine, MARKGOO, JFATXTT) is backordered and will ship as soon as it is back in stock.
Worry-free returns
Worry-free returns
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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.
Tracking information will be provided once your order ships.
Bow Roller Assembly – Fits Multiple Trailer Brands (Replaces GluckM...
Bow Roller Assembly – Fits Multiple Trailer Brands (Replaces GluckMarine, MARKGOO, JFATXTT) is backordered and will ship as soon as it is back in stock.
Product Details
This versatile 7" X 4" Boat Trailer Roller Assembly with 1/2 Inch Shaft Bow Stop 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. The construction ensures resistance to sunlight, chemicals, and water for a long service life.
This assembly serves as a direct replacement for GluckMarine 7" X 4", MARKGOO 7" X 4" Boat Trailer Roller, and JFATXTT 4" Bow Roller.
- Features a simple bolt-on installation for trailers with a 1/2-inch shaft.
- The non-marking polyurethane surface prevents costly damage and scuffs to your boat's hull.
- Includes one bow roller, two end bells, and a bolt with washer for a complete setup.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| GluckMarine | 7" X 4" |
| MARKGOO | 7" X 4" Boat Trailer Roller |
| JFATXTT | 4" Bow Roller |
Engine & Model Compatibility
Confirm your trailer's specifications in the table below.
| Brand | Application | Notes |
|---|---|---|
| Multiple Brands | Boat trailers with 1/2 inch mounting shafts | Provides resilient support for boat's keel |
Technical Specs
- Product Type
- Bow Roller Assembly
- Installation
- Bolt-on (1/2 inch shaft)
- Material
- Polyurethane (PU)
- Color
- Blue (also available in Black)
- Dimensions
- 7" L x 4" W (177.8 mm x 101.6 mm)
- Center Hole Diameter
- 17 mm (0.67 in)
- Shaft Size
- 1/2 inch (12.7 mm)
- Weight
- 0.94 kg (2.07 lb)
- Other Technical Attributes
- Non-marking surface prevents boat hull damage
What’s in the Box
- 1 x Bow Roller (7" x 4")
- 2 x End Bells
- 1 x Bolt with Washer
Installation Notes
- Securely chock the trailer wheels and ensure the boat is properly supported to prevent movement.
- Loosen and remove the nut from the existing bow roller bolt, then slide the bolt out of the bracket.
- Remove the old roller and end bells. Clean any dirt or corrosion from the mounting bracket.
- Position the new end bells on each side of the new bow roller.
- Align the roller assembly with the mounting holes on the bracket and insert the new 1/2-inch bolt.
- Secure the assembly by tightening the washer and nut. Do not overtighten; the roller should spin freely with minimal side-to-side play.
- Double-check the alignment with your boat's bow and make adjustments if necessary.
Troubleshooting & FAQ
How do I know if this roller will fit my trailer?
This bow roller is designed for trailer brackets that use a 1/2-inch (12.7 mm) diameter mounting shaft. Measure your current roller's shaft or bracket hole to confirm compatibility before ordering.
What is the advantage of a polyurethane roller?
Polyurethane (PU) material is highly durable, non-marking, and resistant to damage from UV radiation, chemicals, and water. It protects your boat's hull from scuffs and scratches that harder materials like rubber or PVC can cause.
What are the signs that my bow roller needs to be replaced?
Inspect your bow roller for deep cracks, flat spots, or excessive wear. If the roller is seized and does not spin freely when launching or retrieving your boat, it should be replaced to prevent hull damage and ensure smooth operation.
Is this a replacement for the GluckMarine 7" roller?
Yes, this is a direct, aftermarket equivalent for the GluckMarine 7" X 4" Boat Trailer Roller, as well as models from MARKGOO and JFATXTT. It offers comparable performance and dimensions.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost?
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns?
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
Payment & Security
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