Harken 57mm Runner Block (3224)
Lightweight strength for high-load runner and backstay systems
The Harken 57mm Runner Block is a premium solution for high-performance running backstays and deflector systems, designed specifically for the demands of Grand Prix and offshore racing. As part of Harken’s top-tier Black Magic® AirRunner range, this block combines exceptional load-handling capacity with ultra-smooth operation and minimum weight.
At its core is a one-piece, hardcoat-anodised aluminium sideplate — a design that eliminates fasteners for maximum reliability under extreme conditions. The sheave spins freely on high-load ball bearings, optimised to deliver low friction even under dynamic tension. The V-shaped profile of the sheave grips high-tech lines securely, providing superior control over rig tuning and sail shape.
Built for racers who demand ultimate performance, reliability, and adaptability, the Harken 57mm Runner Block is a go-to choice for serious offshore competitors and custom rigging projects.
Specifications
| Length (mm) | 86 |
| Recommended line - Max Ø (mm) | 12 |
| Sheave Ø (mm) | 57 |
| SWL (kg) | 1134 |
| NBL (kg) | 2500 |
| Weight (g) | 125 |
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