
Ronstan
Ronstan RF20101 20mm Single Loop Head Pulley | Sailing Block
The Ronstan RF20101 is a compact and efficient 20mm single loop head pulley block, engineered for high-performance sailing applications. Designed with ball bearings and a UV-resistant acetal sheave, this Series 20 block delivers low friction and consistent reliability under load.
Its loop head design makes it ideal for fixed-position applications such as cunninghams, vangs, and outhauls, particularly on dinghies and small keelboats. Built with 316 stainless steel cheeks, this block stands up to harsh marine environments.
✅ Key Features
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Ronstan RF20101 Series 20 single loop head block
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20mm ball bearing pulley with acetal sheave
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Ideal for control lines in fixed mounting points
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Durable 316 stainless steel cheeks
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Lightweight design for performance sailing
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UV-resistant, corrosion-proof components
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Suitable for vang, outhaul, cunningham, and more
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Trusted Ronstan quality, built for NZ conditions
Ronstan RF20101 Single Loop Head Pulley Ball Bearing 20mm specifications:
- Sheave Ø 20mm
- Max. Rope Ø 6 mm
- M.W.L. 250 kg
- B. L. 550 kg
- Weight 16 g