Allen 20mm Triple Dynamic Block With Fork. This block offers low friction and fast rolling speeds. It's lightweight and strong, making it ideal for dinghies, windsurfing, kitesurfing and anything else that runs smaller diameter lines. Our Dynamic range is generally the best choice for applications that require constant sheave movement. Fork Head - This block features a removable clevis pin to make the attachment of this 20mm triple dynamic block super easy. Bearings - Dynamic Blocks feature our patented bearing system which uses twin rows of stainless-steel ball bearings running on a stainless-steel rail. This provides a superior load-carrying ability and longevity when compared to other bearing systems which run on a plastic rail. Becket - Our 20 & 30mm blocks offer a large central rivet which not only reduces the overall weight but also offers a rope friendly attachment, perfect as a tie-off point when being used in a cascade system.
