eeWings Aurora are hand-painted using the Saran Texture Method to give each crank its own unique pattern. The color changing paint transitions from gold to green to bronze, depending on the light. This color and texture combination bears a striking resemblance to the Aurora Borealis - a spellbinding natural light phenomenon, witnessed at high latitudes in Winter. Available now in eeWings Mountain 165mm and 170mm and eeWings All-Road in 170mm and 172. 5mm while supplies last. For the rider looking to build a unique bike that is out of this world, you can now purchase a Helm MKII Aurora Fork to match your eeWings Mountain Aurora crankset. The paint on the eeWings Aurora can be expected to chip, scratch, and wear over time with use. Custom cut vinyl protective sticker. will be included in the box.