Ronstan RF55311 Orbit Series 55 Triple Block – Becket & Link HeadThe Ronstan RF55311 Orbit Series 55 Triple Block is engineered for high performance sailing applications, offering exceptional strength to weight ratio. Featuring a 55mm sheave diameter and a Dyneema link head, this triple block with becket is ideal for mainsheet, halyard, and spinnaker systems on dinghies, sportsboats, and small keelboats up to 9m (30ft). Its two stage orbital ball bearing system ensures low friction and high load capacity, making it

Club and competitive sailing

Compact footprint ideal for space-limited installs

Ronstan RF51151 50mm Cheek Block specifications:

Ideal for everyday rigging needs

Spring-loaded toggle design for secure

and manual recovery via standard ½″ socket

Whether you’re preparing for offshore sailing

Whether you're cruising offshore or paddling inland waterways

The DCSM display features clear

With three connection ports

reliable and efficient rope splicing performance

and breathable protection for coastal and inshore sailing