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Description
Boat Trailer Roller Assembly with 1/2" Shaft Bow Stop – Fits 7" x 4" Trailers (Replaces MARKGOO 7X4 INCH)Boat Trailer Roller Assembly with 1 2" Shaft Bow Stop Fits 7" x 4" Trailers This polyurethane bow stop roller provides smooth support for your boat during loading and launching operations on most trailers with a 1 2" mounting shaft. It mounts easily to the winch post or winch stand at the front of the trailer. Direct replacement for MARKGOO 7X4 INCH trailers and similar models requiring a 7" length and 4" width bow stop roller assembly. Includes 1
Boat Trailer Roller Assembly with 1/2" Shaft Bow Stop – Fits 7" x 4" Trailers
This polyurethane bow stop roller provides smooth support for your boat during loading and launching operations on most trailers with a 1/2" mounting shaft. It mounts easily to the winch post or winch stand at the front of the trailer.
Direct replacement for MARKGOO 7X4 INCH trailers and similar models requiring a 7" length and 4" width bow stop roller assembly.
- Includes 1 × Boat Trailer Roller Assembly with 1/2" Shaft Bow Stop
- Blue polyurethane housing offers wear and water resistance
- Mounts to winch post or winch stand on the trailer
Part Number Cross-Reference
Use this table to confirm equivalent part numbers across OEM and aftermarket brands.
| Brand | Part Number |
|---|---|
| MARKGOO | 7X4 INCH |
Compatible Engine Models
Confirm your engine model/year in the table below.
Technical Specifications
| Specification | Value |
|---|---|
| Product Type | Bow Stop Roller Assembly |
| Installation | Mounts to winch post or winch stand |
| Housing Material | Polyurethane |
| Housing Color | Blue |
| Dimensions | 7" overall length × 4" width (178 × 102 mm) |
| Shaft Hole Diameter | 1/2" (12.7 mm) |
| Other Technical Attributes | Will not mark boat, wear-resistant, water-resistant |
Package Contents
- 1 × Boat Trailer Roller Assembly with 1/2" Shaft Bow Stop (Blue, 7" × 4")
Installation Guide
- Locate the winch post or winch stand on the front of your trailer.
- Remove the existing bow stop roller assembly if applicable.
- Align the 1/2" shaft hole of the new roller assembly with the mounting shaft on the trailer.
- Slide the roller assembly onto the shaft fully.
- Secure the assembly with appropriate fasteners and ensure it spins freely.
- Check alignment so the bow of the boat contacts the roller smoothly during loading.
- Test the installation by manually rolling the boat onto the trailer.
- Make any necessary adjustments for proper fit and function.
- Tighten all hardware firmly before regular use.
Troubleshooting & FAQ
- How do I confirm this fits my trailer? Check that your trailer has a 1/2" mounting shaft on the winch post or stand and that dimensions close to 7" x 4" are appropriate.
- How often should I replace the bow stop roller? Replace if you notice wear that reduces smooth rolling, cracking, or damage that may mark your boat.
- What makes this different from OEM parts? 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.
- How fast do you ship and how much does it cost? 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.
- What is your warranty and return policy? 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.
- How do I maintain this roller assembly? Rinse with fresh water after exposure to saltwater and inspect periodically for wear or damage.
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.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.8 ★★★★★
Based on 30 reviews
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Product Reviews
★★★★★ 5
Good stuff !
Model: 36 SqFt(3.4 SqM), Model: 36 SqFt(3.4 SqM)
This is an excellent product. Easily moldable, cuttable with good scissors or razor knife, very sticky, works great.
This pack was enough to do all 4 doors on a crew max truck, and I went wild on the fronts. I used 9 peices on each rear door which was just enough, and the rest on the fronts. I doubled up layers and even used some on the back of the door panels. If you follow the instructions and dont go wild you might even have extra left over.
It works just like you would imagine. Without doing the entire cab there will still be road noise but this helped noise, better audio, no buzzing door panels, terrific improvement.
It is kind of heavy, so extra weight is added to truck, but that really isnt a bad thing. It is noticable but in a good way.
Get it. Use it.
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Reviewed in the United States on March 20, 2026
★★★★★ 4
Good product
Model: 36 SqFt(3.4 SqM)
Easy to roll out. Works great
Why did you pick this product vs others?:
Fair price for the amount of coverage, good quality
Works well:
Easy to install, rolls out great. Forms to contours well
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 13, 2025
★★★★★ 5
Great product
Model: 36 SqFt(3.4 SqM)
I used this on the doors of a Toyota Tacoma, worked as it described. Reduced the road noise significantly.. Need to buy another box for the floor and roof of the truck..
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Reviewed in the United States on May 15, 2026
★★★★★ 5
Great product - Add foam product for complete solution
Model: 36 SqFt(3.4 SqM)
Used in two cars with speaker upgrades. Easy to install but get the roller for assured adhesion.removes "tinnyness" from large metal resonators. Use with foam absorptive material for a complete system.
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Reviewed in the United States on April 14, 2026
★★★★★ 5
Great Product for noise reduction in Auto Use.
Model: 36 SqFt(3.4 SqM)
I use this on many builds to dampen the metal echo in cars, vans, and trucks. Just one sheet in the center of a body panel is a huge difference maker. You can also cover the entire surface and get added insulation value. The noise is greatly depleted and it's easy to install with a roller tool. Looks Great when done. Good Product I will use again!
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Reviewed in the United States on December 29, 2025