Shimano premium greasepremium grease is the same specification used as standard in the best quality shimano bearings features specifically formulated to keep dura ace components running smoothly and increase their life keeps parts rust and corrosion free acts as a barrier to prevent water from reaching bearings a 2 year warranty is offered with all shimano products from chain reaction cycles 3 years on dura ace and xtr products buy shimano greasefrom chain reaction cycles the worlds largest