Park Tool Master Mechanic Spoke Wrenches- SW20.2 and SW22.2
Sapim's super light double butted spoke features a 1.5mm center section for weight reduction. Wire diameter is 2.0-1.5-2.0mm (neck-body-thread).
Sapim butted spokes have two major benefits: less weight and more strength. Technological advances using cold forging "stretch" the spoke, retaining the linear molecular structure of the material, thereby increasing the spoke strength in the middle section.