Why are the end cones on my old spring vs the newer springs different materials?
Torquemaster spring end cone material on the springs vary based on when it was made, what type it is, and what weight it is lifting. The material end cones are made of on new springs will vary based on these same factors. It may be nylon or metal/aluminum. We rarely see the end cones break on the nylon ones. They are quite durable and are rated for 10,000+/- cycles.