{"title":"Ronstan Series 25","description":"\u003cp\u003eBoat equipment in the Ronstan Series 25 category.\u003c\/p\u003e","products":[{"product_id":"ronstan-serie-25-skive-o25-mm-bredde-10-7-tov-8-mm","title":"Ronstan, Series 25 sheave Ø25 mm width 10,7 rope 8 mm","description":"\u003cp\u003eRonstan Series 25 ball bearing sheave is a replaceable 25 mm sheave used for small trimming applications. It fits trim lines up to 8 mm and can replace worn wheels in existing blocks or be used for custom setups.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Ronstan\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSheave diameter:\u003c\/strong\u003e 25 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRope Ø:\u003c\/strong\u003e max 8 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct weight:\u003c\/strong\u003e 5 g\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage dimensions:\u003c\/strong\u003e Gross weight: 0.03 kg\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe sheave is used in Series 25 blocks and fits trim lines up to 8 mm. It can replace worn wheels in existing blocks or be used for custom setups. The construction consists of a precision-moulded acetal sheave with a 2-stage ball bearing system, ensuring low friction and smooth rotation under load.\u003c\/p\u003e\n\u003cp\u003eINSTRUCTIONS FOR USE Install the sheave in a compatible block. Ensure correct placement of bearings and axle. Check for free rotation before loading.\u003c\/p\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":56837386043723,"sku":"130RF28000","price":99.0,"currency_code":"DKK","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0878\/9183\/7259\/files\/130RF28000_XL.jpg?v=1773910192"},{"product_id":"ronstan-serie-25-enkeltblok-med-svirvel-hundsvot","title":"Ronstan, Series 25 single block with swivel","description":"\u003cp\u003eSingle block with swivel and becket designed for dinghies and smaller boat trim. It enables efficient line routing in active control systems and operates reliably under varying loads.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Ronstan\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorking load:\u003c\/strong\u003e 225 kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBreaking load:\u003c\/strong\u003e 450 kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSheave diameter:\u003c\/strong\u003e 25 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRope Ø:\u003c\/strong\u003e max 8 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct weight:\u003c\/strong\u003e 18 g\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage dimensions:\u003c\/strong\u003e Gross weight: 0.04 kg\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe single block is developed for dinghies and smaller boats, where compact trim solutions and low friction are important. It provides smooth line routing in active control systems and performs reliably under varying loads. The block uses an acetal sheave with efficient ball bearing technology, ensuring easy rotation and dependable operation. The construction features a stainless center hub, providing strong mounting and stability in use. This model is used in mainsheet systems, cunningham, cascade systems, and other trim functions on boats up to approx. 4 m. The becket makes it possible to finish a tackle or start a purchase directly in the block. The compact size makes it easy to place close to the mast, boom, or deck fittings. The swivel attachment allows free movement and minimizes twist, ensuring smooth line routing.\u003c\/p\u003e\n\u003cp\u003eUSAGE INSTRUCTIONS Mount the block via the swivel attachment at a fixed point. Run the line correctly through the sheave. Check for free movement before loading and replace the line or block if there is visible wear.\u003c\/p\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":56837386076491,"sku":"130RF28100","price":240.0,"currency_code":"DKK","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0878\/9183\/7259\/files\/130RF28100_XL.jpg?v=1773910191"},{"product_id":"ronstan-serie-25-enkeltblok","title":"Ronstan, Series 25 single block","description":"\u003cp\u003eRonstan Series 25 single block is a lightweight block designed for small trimming tasks on dinghies and smaller boats. It provides efficient control in trimming and steering systems and can handle lines up to 8 mm.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Ronstan\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorking load:\u003c\/strong\u003e 250 kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBreaking load:\u003c\/strong\u003e 550 kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSheave diameter:\u003c\/strong\u003e 25 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRope Ø:\u003c\/strong\u003e max 8 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct weight:\u003c\/strong\u003e 14 g\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage dimensions:\u003c\/strong\u003e Gross weight: 0.03 kg\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe single block is a compact choice for dinghies and smaller boats where stable and lightweight line handling is desired. It provides efficient control in trimming and steering systems and performs well under both low and high loads. The sheave is made of acetal and runs on a 2-stage ball bearing system, which reduces friction and ensures smooth operation. The stainless steel center body makes the attachment reliable and contributes to long service life in a marine environment. The block is suitable for control systems such as mainsheet traveler, cunningham, and cascade vang and can be used with lines up to 8 mm. The eye in the center body allows flexible mounting in many types of rig setups. Its small size makes it ideal on the mast, boom, and deck, where space is limited. The construction provides stable line handling without unnecessary weight and is relevant for both cruising and racing sailors.\u003c\/p\u003e\n\u003cp\u003eINSTRUCTIONS FOR USE Attach the block with suitable rope in the center eye. Ensure correct tension and free rotation before use. Replace the line or block if signs of wear appear.\u003c\/p\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":56837386240331,"sku":"130RF28109","price":150.0,"currency_code":"DKK","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0878\/9183\/7259\/files\/130RF28109_XL.jpg?v=1773910200"},{"product_id":"ronstan-serie-25-enkeltblok-high-load","title":"Ronstan, Series 25 single block high load","description":"\u003cp\u003eRonstan Series 25 single block high load is a lightweight block designed for trim and control systems on smaller dinghies. It is ideal for sailors who want precise and easy adjustment of control and trim lines.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Ronstan\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorking load:\u003c\/strong\u003e 400 kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBreaking load:\u003c\/strong\u003e 1200 kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSheave diameter:\u003c\/strong\u003e 25 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRope Ø:\u003c\/strong\u003e max 8 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct weight:\u003c\/strong\u003e 34 g\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage dimensions:\u003c\/strong\u003e Gross weight: 0.04 kg\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eCompact block for smaller dinghies and sports boats, where low weight and high performance are essential for efficient trimming. Suitable for sailors who want precise and easy adjustment of control and trim lines. The block is built around an acetal ball-bearing system that provides low friction and stable operation under load. The construction is designed to deliver a high strength-to-weight ratio and safe load handling. It is typically used in systems such as mainsheet traveler, cunningham, barber hauler and similar on boats up to 4 m. Fits most standard lines and rig configurations in this boat size. In practice, it provides easy handling and reliable performance when trim is changed frequently. The compact size makes it suitable on tightly rigged decks and booms where space is limited. ]\u003c\/p\u003e\n\u003cp\u003eINSTRUCTIONS FOR USE Mount the block at the desired point according to the manufacturer’s recommendations. Check for smooth friction before use. Avoid overloading and rinse with fresh water after sailing in salt water.\u003c\/p\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":56837386305867,"sku":"130RF28109HL","price":729.0,"currency_code":"DKK","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0878\/9183\/7259\/files\/130RF28109HL_XL.jpg?v=1773910200"}],"url":"https:\/\/www.boatlab.be\/collections\/ronstan-serie-25.oembed","provider":"BoatLab","version":"1.0","type":"link"}