Boat Trailer 8″ Red Poly Parallel Keel Roller with Galvanised Bracket & Spindle Kit – 21mm Bore (SKU: BDA094)

The BDA094 is the gentle giant of your trailer’s roller system — an 8″ red poly parallel roller that cushions and supports your boat’s keel with precision and care. Designed to provide full-surface support across flat keel zones, it reduces pressure points while ensuring smooth loading and unloading.

Constructed from soft, non-marking polyurethane, this roller is perfect for fibreglass and painted hulls. Its flat profile eliminates side rocking, and its 200mm length offers consistent guidance from start to splash.

The 21mm bore is ideal for 20mm spindles, and the included galvanised bracket and spindle make installation quick and corrosion-resistant.

Specifications:

BDA094 combines smoothness, softness, and simplicity — the kind of roller that says “Don’t worry, I got your keel.”

Frequently Asked Questions

• What spindle size does the 21mm bore suit?
  It fits 20mm spindles perfectly, offering a snug and smooth roll.
• Is this suitable for alloy boats?
  Yes! It’s non-marking and gentle on both fibreglass and alloy hulls.
• Does the roller centre the boat?
  No – it’s a flat roller, meant for support. For centering, try Vee or dog bone rollers.
• Is this a full install kit?
  Yes, it includes the roller, galvanised bracket, and spindle kit.

Is This the Right Kit for You?

Recommended For:

• Boat trailers carrying fibreglass or painted hulls
• Setups requiring soft, non-marking support
• Users needing 8″ full-width rollers with stable flat profile
• Trailer builds with 20mm spindles

Not Recommended For:

• Hull types needing centering assistance
• Extremely heavy commercial vessels

Installation Tips:

1. Mount the bracket securely to your trailer frame.
2. Insert the 20mm spindle through the roller’s 21mm bore.
3. Use spacers or washers to reduce side play if necessary.
4. Secure with cotter pins or locknuts. Ensure smooth, centered rolling.