Ronstan RF20302 Series 20 Triple Block with 2-Axis Shackle Head

The Ronstan RF20302 Series 20 Triple Block delivers exceptional performance and sensitivity for dinghy and small keelboat sailors who demand precise feedback from their control lines. This lightweight 20mm triple block features an innovative two-stage bearing system that optimizes efficiency across varying load conditions, making it ideal for applications where smooth operation and tactile response are critical.

Innovative Two-Stage Bearing System:

The block's dual bearing design provides optimal performance under both moderate and high loads. Acetal ball bearings deliver exceptional efficiency during normal operation, while a plain acetal bearing running on a stainless steel race automatically engages under higher loads to prevent bearing distortion while maintaining low friction. This intelligent system ensures consistent, smooth operation regardless of load conditions.

Premium Construction:

• UV-stable acetal sheave for durability and light weight
• Fiber-reinforced nylon cheeks provide rigidity while minimizing weight
• 316 stainless steel load straps for maximum strength
• Low-profile shackle head prevents snagging on smaller lines
• Compatible with 1/4" (6mm) line with 1/8" shackle pin diameter

Versatile Applications:

The RF20302's triple sheave configuration with 2-axis shackle head makes it exceptionally versatile for boom vangs, backstay systems, halyard tuning systems, Cunninghams, and other control line applications where mechanical advantage and smooth operation are essential. The included shackle can be used or removed depending on your specific rigging needs.

Designed for sailors who rely on subtle feedback through their control lines to detect wind changes and trim sails with precision, the Series 20 block delivers the sensitivity and efficiency needed to maximize boat performance.