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V2 RSTD10-G3 Spring Loaded Ferrule

V2 RSTD10-G3 Spring Loaded Ferrule
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V2 has a worldwide reputation for good roller ski ferrules. We tried many different carbide formulations before we found the best compromise between hardness and strength. Carbide is very brittle, and if not securely held in the plastic housing the tip can easily break. We developed geometry between the carbide tip and plastic that for over twenty years has been bulletproof.

When we decided to make a shock-absorbing ferrule, we knew from experience that spring loading the carbide tip was not the answer. We wanted the shock-absorbing feature to be independent of the carbide tip. The major advantage is that if the shock-absorbing spring should fail, the carbide tip remains intact and the skier is still able to pole. For the G3 version, we changed the spring retainer from a plastic unit to a high-strength 4mm socket bolt. We are now able to use a smaller diameter spring with a higher damping force. As can be seen in the graph below, the damping stroke has been increased by approximately 40%. The spring force when the damping plunger first hits the pavement is lower on G3 than on the previous models, but after only 1.5mm of compression the force is equal to starting force of G1 & G2, and then increases rapidly. When the carbide tip penetrates the pavement the damping force of G3 is more than 2 times greater than G1 and G2. The result is greater shock absorption. Another advantage with G3 is that if the spring should fail it can be replaced by removing the nut and 4mm bolt. This was not possible in the G1 and G2 version


Tools required: 3mm Allen wrench (supplied) and 7mm wrench (not supplied). The damping stroke can be shortened by tightening the nut. We do not recommend lengthening the damping stroke by loosening the nut. To replace the spring, or bolt, simply place the 3mm Allen wrench in the head of the socket bolt and with the 7mm wrench remove the nut and install a new spring or bolt. When supplied the bolt is covered with a light layer of grease. If the spring-loaded device is not moving smoothly compress the spring by pushing the bolt against a solid object and put grease on the non-threaded portion of the bolt.