30MM BLOCK-SINGLE

30mm Single Dynamic Block

High-Performance Sailing Block for Racing & Cruising

The Allen 30mm Single Dynamic Block is the ideal solution for any rigging application demanding constant, smooth sheave rotation. Engineered for performance sailors and racing crews, this block delivers exceptional efficiency wherever continuous line movement is critical — from mainsheet systems to kicker controls and cascade setups.

Patented Bearing System

 At the heart of this block lies Allen's innovative twin-row stainless-steel ball bearing system, running on a stainless-steel rail. This design provides outstanding load-carrying capacity and long-term durability, significantly outperforming conventional systems that rely on plastic rails — a key advantage in demanding offshore and inshore conditions.

Ultra-Strap Technology

The 30mm Dynamic Block features Allen's patented Ultra-Strap, an industry-first rope attachment system engineered through a unique coining process. This manufacturing technique reinforces the strap at a structural level, delivering superior strength, exceptional wear resistance and outstanding rope-friendliness. Unlike traditional metal attachments, the Ultra-Strap was the first marine block component designed from the ground up to work specifically with rope — protecting your lines and reducing wear over time.

Becket Attachment 

The large central rivet becket provides a lightweight yet strong rope-friendly attachment point, making this block perfectly suited for cascade systems, purchase arrangements and multi-purchase tackles. The low-profile riveted becket reduces overall block weight without compromising structural integrity.Whether you're racing on the inshore circuit or cruising offshore, the Allen 30mm Single Dynamic Block delivers the reliability, smoothness and longevity that demanding sailors require.