Boat Trailer Roller Shaft - Fits Multiple Brands & Models
Boat Trailer Roller Shaft - Fits Multiple Brands & Models is backordered and will ship as soon as it is back in stock.
Worry-free returns
Worry-free returns
Shop with confidence. If you’re not completely satisfied, eligible items may be returned within the return window, provided they are unused and in original packaging.
If the return is due to our error or a defective item, we’ll make it right.
Please contact us before returning any item.
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.
Boat Trailer Roller Shaft - Fits Multiple Brands & Models
Boat Trailer Roller Shaft - Fits Multiple Brands & Models is backordered and will ship as soon as it is back in stock.
Product Details
This Boat Trailer Roller Shaft is an essential component for your trailer, designed to support the boat's weight, absorb road shock, and protect the hull during loading and unloading. Available in both 304 Stainless Steel and Zinc Plated Steel, these shafts are built for durability in marine environments. They are compatible with most standard keel rollers and bow rollers.
While these shafts are designed to fit a wide range of applications, direct OEM part number cross-references are not available; fitment should be confirmed by dimension.
- Installs with a direct bolt-on design using the included pal nuts.
- Choose from 304 Stainless Steel for maximum corrosion resistance or Zinc Plated Steel for a durable, cost-effective option.
- Available in multiple diameters (1/2" and 5/8") and various lengths to fit your specific setup.
Compatible Roller Types
These shafts are compatible with a wide variety of common roller types. Check your roller's dimensions to ensure a proper fit.
| Roller Type | Dimension | Material | Notes |
|---|---|---|---|
| Bow Rollers | 3-4 inch | Polyurethane/Rubber | Including Stoltz ULT-4 Ultimate Bow Roller |
| Keel Rollers | Various sizes | Polyurethane/Rubber | Stoltz and other brands |
| V-Stop Rollers | 3-4 inch | Rubber | For bow of boat |
Technical Specs
- Product Type
- Boat Trailer Roller Shaft
- Installation
- Direct bolt-on with pal nuts
- Material Options
- 304 Stainless Steel or Zinc Plated Steel
- Diameter Options
- 1/2 inch (12.7 mm) or 5/8 inch (15.9 mm)
- Length Options
- Multiple available: 4.25", 5.25", 6.25", 9.25", 11", 13.5", 14.25", 15.125", 19"
- Fastener Type
- Pal nuts (included with some models)
- Function
- Supports boat weight on trailer, absorbs road shock
- Compatibility
- Works with most keel rollers and bow rollers
- Common Applications
- Boat trailer keel rollers, bow stops, winch post rollers
Available Size Configurations
| Diameter | Length | Material | Notes |
|---|---|---|---|
| 1/2 inch (12.7 mm) | 4.25 inch (108 mm) | 304 Stainless Steel | For bow rollers |
| 1/2 inch (12.7 mm) | 5.25 inch (133 mm) | Zinc Plated | For 4-inch rollers |
| 1/2 inch (12.7 mm) | 6.25 inch (159 mm) | Zinc Plated | For keel rollers |
| 5/8 inch (15.9 mm) | 6.25 inch (159 mm) | Zinc Plated | For keel rollers |
| 5/8 inch (15.9 mm) | 9.25 inch (235 mm) | Zinc Plated | For keel rollers |
| 5/8 inch (15.9 mm) | 11 inch (279 mm) | Zinc Plated | For keel rollers |
| 5/8 inch (15.9 mm) | 13.5 inch (343 mm) | Zinc Plated/Stainless Steel | For keel rollers |
| 5/8 inch (15.9 mm) | 19 inch (483 mm) | Zinc Plated | For keel rollers |
What’s in the Box
- 1 x Roller Shaft (specific size as ordered)
- 2-4 x Pal Nuts (included with some models)
Installation Notes
- Safely secure the boat and trailer on a level surface.
- Remove the old roller shaft, which may involve removing cotter pins or pal nuts.
- Inspect the roller and brackets for wear or damage and replace if necessary.
- Align the new roller within its bracket.
- Insert the new roller shaft through the bracket and the roller.
- Secure the new shaft in place using the provided pal nuts. A socket or mallet may be used to tap them on securely.
- Ensure the roller spins freely on the shaft without excessive side-to-side movement.
Troubleshooting & FAQ
How do I choose between Stainless Steel and Zinc Plated?
Choose 304 Stainless Steel for maximum corrosion protection, especially for saltwater use. Zinc Plated steel offers good rust resistance for freshwater applications and is a more economical choice.
How do I know which shaft length and diameter to order?
Measure your existing shaft's diameter and overall length. If replacing the roller as well, measure the inner width of the mounting bracket and the inner diameter of the roller to determine the correct shaft size.
When should I replace my roller shafts?
Inspect your shafts regularly for signs of bending, heavy corrosion, or significant wear. Replace them immediately if any damage is found to prevent trailer failure and potential damage to your boat's hull.
What are pal nuts and how do they work?
Pal nuts, or push nuts, are single-thread locknuts that grip the shaft to hold it in place. They are typically installed by tapping them on with a hammer or a deep socket until they are snug against the bracket.
Can I reuse my old pal nuts?
It is not recommended. Pal nuts are designed for a single use, as they deform to grip the shaft. For a secure installation, always use new pal nuts.
The shaft seems too short for the bracket. Is this normal?
The shaft must be long enough to pass through both sides of the mounting bracket with enough space to attach the pal nuts securely. It should not be so long that it allows excessive side-to-side roller movement. Always confirm your measurements before ordering.
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
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
