The 91521 8" Red Poly Concave Roller is a soft polyurethane boat trailer keel roller designed to support, guide and centre the hull during launching and retrieval. It measures approximately 203mm / 8" wide, with a 21mm centre bore and a concave profile ranging from approximately 45mm to 72mm diameter. Its UV-stable, non-marking red polyurethane construction makes it particularly suitable for fibreglass boats.
Boat Trailer Rollers - Red
8" Red Poly Concave Keel Roller 21mm Bore
SKU: V-91521
$30.80
Key benefits
Key Benefits
- 8" / 203mm wide
- 21mm / 0.827" centre bore
- Designed for approximately 20mm / 0.787" spindle
- 45mm / 1.77" centre diameter
- 72mm / 2.83" outside/end diameter
- Soft red polyurethane construction
- Concave profile helps guide and centre the keel
- UV-stable and non-marking
- Particularly suited to fibreglass hulls
- Machined from a solid piece of material
Roller & Spindle Compatibility
- The 21mm bore is designed to provide running clearance around an approximately 20mm spindle, allowing the roller to rotate freely.
Suitable Applications
- The 91521 is suitable for boat trailer keel and centreline roller assemblies, particularly on fibreglass boats. The softer polyurethane provides a hull-friendly contact surface, while the concave shape helps keep the keel aligned with the trailer centreline during retrieval.
Signs the Roller Needs Replacing
- Replace the roller if it becomes cracked, deeply grooved, distorted, seized or excessively loose around the spindle. Also inspect the spindle for corrosion, bending and wear grooves whenever replacing a keel roller.
Shipping
Ships Australia-wide