12" Self-Centering Keel Roller – Fits Boat Trailers (Replaces 50080992, RP-SC12)

12" Self-Centering Keel Roller – Fits Boat Trailers

This 12-inch self-centering keel roller is designed for boat trailers, providing reliable and non-marking support for your vessel's hull during launch and recovery. Its durable polyurethane/polymer blend construction ensures it will not mark or scratch your boat, while the embedded grooves automatically guide and center the keel as you load the boat onto the trailer.

Engineered to fit standard 5/8" diameter roller shafts, this component serves as a direct replacement for several common part numbers, including SeaSense 50080992, Stoltz Industries RP-SC12, Tie Down 23725, CE Smith, and JFATXTT 12" Heavy Duty models.

• Material: Non-marking polyurethane/polymer with an aluminum inner sleeve.
• Design: Self-centering grooves for automatic boat alignment.
• Installation: Mounts on standard boat trailer keel roller brackets with a 5/8" shaft.

Compatible Models

Confirm your trailer setup in the table below.

Technical Specifications

Package Contents

• 1 × 12" Self-Centering Keel Roller (50080992/RP-SC12)

Installation Guide

1. Place the keel roller into a standard boat trailer roller bracket.
2. Slide a 5/8" boat trailer roller shaft through the bracket and the center bore of the roller.
3. Secure each end of the shaft using either pal nuts or cotter pins to lock the roller in place.
4. Attach the entire roller bracket assembly to the boat trailer's cross-member using a U-bolt. For a typical 3" × 3" cross-member, a U-bolt measuring 1/2" × 3" × 4-5/16" is recommended.

Troubleshooting & FAQ

How do I know if this roller will fit my trailer?
This roller is compatible with any boat trailer that uses a 5/8" diameter roller shaft. You should measure your existing shaft or bracket to confirm the size before ordering.

What is the benefit of a "self-centering" roller?
The deep grooves in the roller are designed to catch the boat's keel and automatically guide it to the center of the trailer during recovery. This makes loading the boat easier and safer, especially in windy or current-heavy conditions.

Will this roller mark or damage my fiberglass hull?
No, it is made from a high-quality polyurethane or polymer blend that is specifically formulated to be non-marking and durable, protecting your boat's finish.

Are all 12" rollers the exact same size?
There can be minor variations between brands. For example, the SeaSense model is listed at 11-3/8" in length, while others like Stoltz are a true 12". These slight differences do not typically affect performance.

OEM vs. Aftermarket?
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.

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.