12" Self-Centering Keel Roller – Fits Boat Trailers (Replaces SeaSense 50080992, Stoltz RP-SC12)
12" Self-Centering Keel Roller – Fits Boat Trailers (Replaces SeaSense 50080992, Stoltz RP-SC12) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
Worry-free returns
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
12" Self-Centering Keel Roller – Fits Boat Trailers (Replaces ...
Product Details
This 12" Self-Centering Keel Roller is designed for boat trailers, providing non-marking protection for your boat's hull during launch and recovery. Its grooved, self-centering design automatically aligns the boat for easier loading. The roller is compatible with standard 5/8" diameter roller shafts, making it a versatile fit for many trailer setups.
It serves as a direct replacement for several part numbers, including SeaSense 50080992, Stoltz Industries RP-SC12, Tie Down 23725, and others.
- Mounts to standard boat trailer keel roller brackets using a 5/8" shaft.
- Constructed from a durable, UV-resistant polyurethane/polymer blend that will not mark your hull.
- The self-centering design simplifies the process of loading your boat onto the trailer.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| SeaSense | 50080992 |
| Stoltz Industries | RP-SC12 |
| Tie Down | 23725 |
| CE Smith | - |
| JFATXTT | 12" Heavy Duty |
Engine & Model Compatibility
Confirm your application in the table below.
| Brand | Model | Notes |
|---|---|---|
| All Brands | Boat Trailers | Designed for use on boat trailer cross-members along the centerline, typically mounted with roller brackets and U-bolts to 3" × 3" cross members. |
Technical Specs
- Product Type
- Self-Centering Keel Roller
- Installation
- Fits 5/8" diameter roller shaft
- Connection
- 5/8" center hole/bore
- Housing Material
- Polyurethane/Polymer blend with aluminum inner sleeve
- Housing Color
- Black (varies by brand)
- Dimensions
- 12" length × 2-3/4" end width (11-3/8" × 2-3/4" for SeaSense model)
- Fitting Type
- Mounts to standard boat trailer keel roller brackets
- Warranty
- Varies by manufacturer
- Other Technical Attributes
- UV-resistant formula, embedded grooves for automatic boat centering
What’s in the Box
- 1 × 12" Self-Centering Keel Roller (50080992/RP-SC12)
Installation Notes
This roller should be fastened into a boat trailer roller bracket using a 5/8" boat trailer roller shaft. The shaft is secured at each end with either pal nuts or cotter pins. The entire assembly is then attached to the boat trailer cross-member with U-bolts. For a typical 3" × 3" cross-member, a U-bolt measuring 1/2" × 3" × 4-5/16" is required.
Troubleshooting & FAQ
What size roller shaft does this roller fit?
This keel roller is designed to fit a standard 5/8" diameter boat trailer roller shaft.
Why are there different lengths listed (12" vs. 11-3/8")?
The industry standard length is 12 inches. However, some brands like SeaSense produce a slightly shorter version at 11-3/8 inches. Both lengths are designed for the same applications and mounting brackets.
Will this roller mark my boat's hull?
No, it is made from a high-quality, non-marking polyurethane or polymer blend specifically formulated to protect your boat's gel coat and finish during launch and retrieval.
How does the self-centering feature work?
The roller features deep grooves that guide the keel of the boat, automatically aligning it to the center of the trailer as you load it, which makes the process quicker and easier.
When should I replace my keel roller?
Inspect your rollers regularly. You should replace them if you see significant signs of wear such as cracking, splitting, or chunking, or if the roller no longer spins freely. A worn-out roller can damage your boat's keel.
How do I secure the roller onto the bracket?
The roller slides onto a 5/8" roller shaft, which is then mounted to the trailer bracket. The shaft is typically secured on each end with pal nuts or cotter pins (sold separately) to keep the roller in place.
Is this an OEM or aftermarket part?
This listing is an aftermarket replacement (not OEM). It is built to OEM-level specifications with comparable materials and manufactured in an ISO 9002 facility, where it is batch-inspected for consistency.
What are the shipping speed and cost?
We ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free to most locations, and expedited options may appear at checkout where available.
What is the warranty and return policy?
This product is covered by a 1-year warranty against manufacturing defects under normal use. If any issues arise, please contact our support team with your order details. Returns are accepted within our standard window for unused items in their 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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