Overview
The 8″ (~203 mm) Blue Nylon Self‑Centring Centre Roller (Part No. 91331) is engineered for aluminium boats and trailers. CNC-machined from premium HDPE nylon, it features a concave profile with centring grooves to gently guide your vessel into alignment during launch and retrieval. It uses a 17 mm bore so it mounts easily onto standard trailer spindles.
Key Features
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203 mm width – offers strong hull support with smooth operation
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17 mm central bore – fits common spool brackets and spindle setups
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Blue hard nylon (HDPE) – non-marking, ultra-durable, and wear-resistant
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Self-centring profile – grooves help centre aluminium hulls automatically
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Marine-grade tolerances – UV-stable and built for harsh Aussie marine conditions
Applications
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Ideal for aluminium or rigid-hull boat trailers
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Positioned near the bow to auto-centre before engaging the winch post
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Use as main keel support or intermediate roller to protect hull integrity
Specifications
| Feature | Details |
|---|---|
| Roller Width | 8″ (~203 mm) |
| Bore Size | 17 mm |
| Material | HDPE blue nylon, non-marking & UV‑stable |
| Profile | Self‑centring concave with grooves |
| Part Number | 91331 |
Why Choose This Roller
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Only $22.00 AUD
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Rigid HDPE construction resists wear and cracking
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Self-centring grooves minimize hull slip when loading
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Ships fast from Queensland, backed by a 12‑month manufacturer warranty
Shipping is calculated at checkout based on your location.