Ronstan RF15100 15mm Single Swivel Block – Series 15 Pulley NZ
The Ronstan RF15100 Series 15 Single Swivel Block is one of the smallest and lightest high-performance sailing pulleys available, designed for applications where low friction, minimal weight, and efficiency are critical. Featuring a 15mm precision-moulded acetal sheave running on stainless steel ball bearings, it delivers exceptionally smooth operation for fine control systems.
Built with UV-stabilised acetal components and 316 stainless steel cheeks, the RF15100 offers excellent durability and corrosion resistance in New Zealand’s harsh marine conditions. Its swivel shackle head allows full rotation and optimal alignment under load, reducing line twist and improving system efficiency.
Ideal for dinghies, trailer yachts, and high-performance rigs, this compact block is widely used in vang, cunningham, outhaul, and shock cord tensioning systems, where precision and responsiveness are essential. Key Features
- 15mm single sheave for compact, lightweight performance
- Ball bearing system for ultra-low friction operation
- Swivel head shackle allows full rotation and alignment
- 316 stainless steel cheeks for corrosion resistance
- UV-stabilised acetal sheave for durability and smooth running
- Extremely lightweight design (approx. 11g)
- Ideal for dinghy control lines and performance sailing systems Specifications
- Sheave Diameter: 15mm
- Max Rope Diameter: 5mm
- Maximum Working Load: 120kg
- Breaking Load: 400kg
- Weight: Approx. 11g
- Construction: Acetal sheave, stainless steel cheeks
- Head Type: Swivel shackle Why Choose the Ronstan RF15100?
For New Zealand sailors, reducing friction and weight is key to improving performance. The RF15100 delivers exceptional efficiency in a compact form, making it perfect for high-performance dinghies and finely tuned control systems.
Its robust construction and smooth operation ensure reliable performance in both coastal and competitive sailing conditions, making it a go-to choice for precision rigging setups.