8″ Ark Red Polyurethane V-Block Self-Centering Keel Roller – 17mm Bore for Fibreglass Boats (SKU: 3246)

The Ark 8″ V-Block Self-Centering Roller (SKU: 3246) is purpose-built to protect and guide fibreglass boat hulls during launching and retrieval. With a deep V-shape and soft polyurethane build, it offers a perfect balance between strength and hull safety – especially ideal for solo launching or shallow ramps.

Constructed from non-marking, UV-stabilised polyurethane, this roller withstands tough Aussie marine environments while protecting your gel coat. Its 17mm bore fits most standard trailer shafts (especially 16mm spindles), making it easy to upgrade or replace without fuss.

Whether you’re setting up a professional rig or a weekend warrior’s trailer, this red Ark roller ensures every launch is smooth, aligned, and worry-free.

FAQ

• Q: Will this roller fit my trailer shaft?
  A: It suits 17mm bore brackets and is ideal for 16mm spindles. Double-check your shaft size before purchase.
• Q: Is it suitable for aluminium hulls?
  A: It’s specifically designed for fibreglass hulls. Aluminium boats may prefer firmer rollers.
• Q: Will the red polyurethane leave marks?
  A: No – the material is non-marking and safe for gel coat hulls.
• Q: Is this roller soft or firm?
  A: It’s medium-soft to protect fibreglass without compromising support.

Evaluation & Recommendation

Recommended for:

• Fibreglass boat owners needing hull protection during launching.
• DIY or professional trailer setups requiring centre alignment support.
• Boat trailers that use 17mm bore rollers (esp. older or local builds).

Not ideal for:

• Aluminium boats that benefit from firmer rollers.
• Trailers with 21mm or oversize shafts—this bore is 17mm.

Installation Tips:

1. Check shaft compatibility (17mm bore, fits 16mm spindles best).
2. Clean the shaft and slide on the new roller.
3. Secure with washers and hardware, ensuring centered alignment.
4. Test spin to confirm smooth rotation before use.