Virtually all spoke failures happen at the bend. Eliminating the bend does not solve this problem, as makers of straight-pull spokes have found. The problem is that the spokes still have the work hardened "nail head." Cold forming this head creates a brittle, work hardened area with inborn stresses susceptible to a shortened life due to accelerated fatigue. Easton eliminates this work hardened head by threading the spokes directly into the hub.

THE Solution
It's a simple, elegant solution to an age old problem - but it's based on sound engineering principles. As we've already mentioned, Easton Twin Thread Technology eliminates the residual stresses from forming the traditional bend or "nail head" of a straight-pull spoke. Also, the threaded portion of our spoke is bedded deep into the hub and is fully supported in all planes. This firm connection serves to strengthen the spoke.  Static and dynamic loads in Easton Twin Threaded spokes are distributed over the length of the threads, instead of being concentrated at the headed end where ordinary spokes are weakest.  Peak stresses are therefore lower in Easton Twin Threaded spokes. What does all this mean? Lower peak stress means longer fatigue life.  Our incidence of spoke failure has been reduced to virtually zero. The beauty of Twin Threaded Technology is we did this without resorting to exotic materials or over engineered solutions. Because twin threaded spokes are stronger, each one can handle a greater load.  Easton wheels therefore need fewer spokes, resulting in lighter wheels with improved aerodynamics. Twin Threaded Technology - double threaded spokes - stronger, lighter, faster, and more durable... enough said!