Boat Trailer 4″x4″ Grey Poly Wobble Roller – Grooved Non-Marking 25mm Bore (SKU: WRGG90X112X25)

WRGG90X112X25 – 4″x4″ Grey Poly Grooved Wobble Roller is a high-quality non-marking support roller built to gently cradle your boat during launch and retrieval. Designed for keel or side support on boat trailers, this roller features a grooved ribbed design that helps centre and stabilise your hull while preventing scratches or marks on painted or fibreglass surfaces.

Constructed from durable poly material, this roller is UV resistant, non-marking, and long-lasting. The 25mm bore fits standard 20–22mm shafts with bushes or sleeves. It’s the ideal replacement or upgrade for aging rubber rollers that leave streaks or wear quickly under load.

Key Specifications:

• Size: 4″ x 4″ (112mm height x 90mm width)
• Type: Grooved / Ribbed – for better hull grip and centring
• Bore: 25mm
• Fits: 20mm to 22mm shafts (with bush or sleeve)
• Material: Polyurethane – grey, non-marking
• Weight: Approx. 0.90kg
• Use: Side or keel roller on boat trailers

This roller delivers smooth boat handling, extended durability, and a clean finish – perfect for all types of watercraft, including aluminium, fibreglass, and painted hulls.

WRGG90X112X25 – 4″x4″ Grey Poly Grooved Wobble Roller is a high-quality non-marking support roller built to gently cradle your boat during launch and retrieval. Designed for keel or side support on boat trailers, this roller features a grooved ribbed design that helps centre and stabilise your hull while preventing scratches or marks on painted or fibreglass surfaces.

Constructed from durable poly material, this roller is UV resistant, non-marking, and long-lasting. The 25mm bore fits standard 20–22mm shafts with bushes or sleeves. It’s the ideal replacement or upgrade for aging rubber rollers that leave streaks or wear quickly under load.

Key Specifications:

• Size: 4″ x 4″ (112mm height x 90mm width)
• Type: Grooved / Ribbed – for better hull grip and centring
• Bore: 25mm
• Fits: 20mm to 22mm shafts (with bush or sleeve)
• Material: Polyurethane – grey, non-marking
• Weight: Approx. 0.90kg
• Use: Side or keel roller on boat trailers

This roller delivers smooth boat handling, extended durability, and a clean finish – perfect for all types of watercraft, including aluminium, fibreglass, and painted hulls.

Evaluation & Recommendation

The WRGG90X112X25 poly wobble roller is ideal for boat owners seeking smoother launching, longer roller life, and hull-safe support. It’s an excellent upgrade from standard black rubber rollers, especially for fibreglass or painted boats.

Recommended for:

• Boat trailers carrying aluminium, fibreglass, or painted hulls
• Users replacing worn-out or marking rubber rollers
• Keel or side roller setups needing centred support

Installation Tips:

• Use a 25mm shaft or sleeve bush to adapt to your 20–22mm axle
• Check for free spinning without wobble after fitting
• Lubricate shaft lightly to minimise squeaking and wear

Need help matching this with your trailer setup? Let us know your shaft size and we’ll guide you to the right bush or bracket combo!