Boat Trailer Roller Bracket Spindle Shaft for 4″ Roller | Galvanised 16mm (SKU: SPIND100G)

The SPIND100G is our most compact and lightweight spindle shaft, specifically made for 4″ (100mm) boat trailer keel rollers. With a 16mm diameter and a tough galvanised finish, this little unit is built to keep your small trailer rolling smoothly, even in salty conditions.

Ideal for dinghies, kayaks, or jet ski trailers, this spindle is perfect for setups where space and weight are limited, but reliability is still crucial. It installs easily and works seamlessly with most roller brackets accepting a 16mm shaft.

Great For:
– Super-light trailers
– Replacing worn shafts in 4″ rollers
– Salt and freshwater applications
– Compact trailer builds and narrow brackets

Product Highlights:
– 16mm diameter for 4″ rollers
– Galvanised for corrosion resistance
– Only ~100g – featherweight and easy to handle
– Simple DIY installation

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Frequently Asked Questions

• Q: What roller size does this fit?
  A: It’s designed specifically for 4″ (100mm) keel rollers with a 16mm bore.
• Q: Is the shaft strong enough?
  A: Yes—while lightweight, it’s made of galvanised steel and suited for small boats and trailers.
• Q: Will it rust in marine environments?
  A: No worries—the galvanised coating protects it from salt and water exposure.
• Q: Can I install it myself?
  A: Absolutely! It’s easy to install with basic tools—perfect for DIY trailer maintenance.

Who Is This For?

✔️ Perfect if you:

• Have a small trailer using 4″ rollers
• Need a 16mm shaft compatible with your brackets
• Prefer a lightweight, easy-to-handle component

❌ Might not suit you if:

• You’re using 6″, 8″ or larger rollers
• Your trailer handles heavy loads or wide keel supports

Quick Installation Guide

1. Slide the shaft through the 4″ roller.
2. Align with your bracket holes and insert.
3. Secure with pins or bolts.
4. Ensure roller rotates freely and is centered.

Compare Our Spindle Shaft Range
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