Boat Trailer Blue Vee Roller 8″ Poly 17mm Bore – Concave Keel Alignment Roller (SKU: VRBB200X17)

The 8″ Blue Vee Roller (VRBB200X17) is crafted for trailers that require precise keel alignment and use 17mm shafts.
Made from high-quality, non-marking polyethylene, this roller is built to last and handle the roughest boat ramps with ease.

The concave (V-shaped) profile gently cradles your boat’s keel, guiding it into position during loading and retrieval.
Perfect for painted and fiberglass hulls where protection is key, and highly recommended for users launching in tidal, angled, or bumpy ramps.

The 17mm bore fits most light- to mid-duty trailer brackets. Smooth blue finish ensures no black marks or scuffs.

Specifications:

Whether you’re restoring an older trailer or fine-tuning your current setup, this roller offers reliability, alignment, and peace of mind.

Frequently Asked Questions

• What’s the difference between 17mm and 21mm rollers?
  It’s the inner hole size – this model fits 17mm shafts. Measure your current shaft before purchasing.
• Is polyethylene better than rubber?
  For non-marking, UV resistance, and longevity—yes. Poly is the go-to for many modern trailers.
• Where should this roller be mounted?
  Under the keel at the bow or midline, where alignment and support are needed most.
• Can I use this on a tinnie?
  Yes! It’s great for small to medium boats, including tinnies and light fiberglass hulls.

Is This the Right Roller for You?

Recommended For:

• Trailer setups using 17mm shaft diameter
• Users needing precise keel guidance
• Boats with fiberglass or painted hulls
• Launching on uneven or angled boat ramps

Not Recommended For:

• Heavy-duty boats requiring 21mm shafts
• Non-keel applications or flat bunk trailers

Installation Tips:

1. Verify shaft size: this model fits 17mm diameter.
2. Remove any old or worn-out roller.
3. Clean and inspect the shaft before installing.
4. Slide the roller on and ensure it rotates freely.