4½″ (115 mm) Red Poly Flat Bilge Centre Roller – 17 mm Bore (P/N 91527)

Overview
This 4½″ (≈115 mm) red polyurethane flat bilge centre roller, with 17 mm bore (P/N 91527), is built for smooth keel alignment on fibreglass boat trailers. Made from UV-stabilised red poly, it provides gentle, non-marking support for wide hull configurations or intermediate roller setups.

Key Features

• 115 mm wide flat roller – suited for wider keel or bilge contact

• 17 mm bore size – compatible with standard spindle brackets

• UV‑stable red poly – soft, resilient, and non-marking on fibreglass

• Designed for fibreglass trailers – protects delicate hulls

• Australian marine-grade quality – built to withstand harsh saltwater and trailer conditions

Applications

• Ideal as a centre or bilge roller on fibreglass hull trailers

• Commonly used on wide/flat keel support rails or paired with side rollers

• Perfect for small- to medium-size trailers requiring flat contact surfaces

Specifications