XD-15 Speed grease is used in all of Enduro's ceramic hybrid bearing options. You'll also find it in the 440C stainless steel cartridges. The formulation is Kluber NBU52, which only runs better and smoother with time and is highly resistant to being washed out. It is engineered to stick to the balls and continually be pulled back into the ball path where it is needed. This grease is super shear offering low friction yet still maintains water resistant properties. 10ml syringe.