Flat Keel Roller + Bracket 19mm Bore

Maypole Bracket & Flat Keel Roller Assembly – 19mm Bore – Heavy-Duty Boat Trailer Support Kit

The Maypole Bracket & Flat Keel Roller Assembly is a heavy-duty, marine-grade support system designed to guide and protect your boat's keel during launching, recovery, and transport. Supplied as a complete assembly, it combines a non-marking polyurethane flat keel roller with a heavy-duty zinc-plated steel bracket, providing dependable support and long-lasting performance for boat trailers operating in both freshwater and saltwater environments.

The flat polyurethane keel roller is manufactured from high-quality, non-marking material that cushions the keel while helping protect the hull from scuffs, scratches, and abrasion. Measuring 127mm wide with a 19mm bore, the roller rotates smoothly on the supplied 19mm solid steel spindle, reducing friction and allowing easier boat loading and unloading.

The robust support bracket is manufactured from 50mm × 6mm clear zinc-plated steel strip, offering excellent strength and corrosion resistance for demanding marine use. Slotted mounting holes accommodate M10 fixings (not included), allowing adjustment to suit a wide range of trailer configurations.

Designed for compatibility with Maypole MP4621 and MP4631 keel rollers, this complete assembly is ideal for boat trailer maintenance, refurbishment, or new trailer builds.

• Genuine Maypole keel roller and bracket assembly
• Complete kit including flat keel roller, bracket, and 19mm spindle
• Non-marking polyurethane keel roller
• Heavy-duty zinc-plated steel bracket
• Solid 19mm steel spindle
• Corrosion-resistant construction
• Adjustable slotted mounting holes
• Smooth keel support during launching and recovery
• Suitable for freshwater and saltwater use
• Easy installation
• Long service life

Product Type: Flat Keel Roller & Bracket Assembly
Brand: Maypole
Manufacturer Part Number: MP4631 + MP4701

Keel Roller

• Type: Flat Keel Roller
• Material: Non-Marking Polyurethane
• Width: 127mm
• Minimum Diameter: 51mm
• Maximum Diameter: 70mm
• Weight: 370g
• Bore Diameter: 19mm

Bracket

• Material: Clear Zinc-Plated Steel (50mm × 6mm)
• Maximum Internal Width: 135mm
• Overall Height: 72mm
• Spindle Diameter: 19mm Solid Bar
• Mounting Hole Centres: 66–81mm
• Fixing Type: M10 Bolts (Not Included)

Compatible Rollers

• MP4621
• MP4631

• Boat Trailers
• Dinghy Trailers
• RIB Trailers
• Inflatable Boat Trailers
• Fishing Boat Trailers
• Marine Transport Equipment
• Boat Trailer Repairs
• Trailer Refurbishments

• Supports and protects the boat keel during launching and recovery
• Non-marking roller helps prevent hull damage
• Heavy-duty bracket and 19mm spindle provide increased strength
• Corrosion-resistant construction for marine environments
• Adjustable mounting for versatile installation
• Smooth rolling action reduces friction
• Suitable for replacement or new trailer builds
• Reliable long-term performance

• Complete Roller & Bracket Kit
• Flat Polyurethane Roller
• Non-Marking Construction
• Heavy-Duty Zinc-Plated Bracket
• 19mm Solid Steel Spindle
• Adjustable Mounting
• Corrosion Resistant
• Marine Grade Construction
• Freshwater & Saltwater Suitable
• Long Service Life

Securely packaged and dispatched same working day if purchased by 1 p.m.