Pressure welded U spikes are the hallmarks of Nordchain/Gunnebo Skogsgrip, Superstud, and Megastud chains. They have been copied many times. The U spikes resist twisting even under side loads, assuring the best traction force. Yet the open U also prevents branches from being spiked up.
The chain NORDCHAIN chain/Gunnebo Piggelin Flex is a development for skidders that need frequent chain changes, work at speeds as high as 30 km/h, and yet manage to transfer high traction forces in brushwood and on ice and snow. The turned links lying flat on the tyre roll off with great ease, and the spikes on the front and rear of the link provide enormous grip, at the same time protecting the chain against wear. A highly powerful and cost effective chain for skidders.