High quality lithium based grease containing molybdenum with high drop point, Unique boot design depending on riding terrain for heat reduction, Dual heat treated axle components for added strength, 20-30% larger components compare to heavy-duty, CNC machined, micro-polished internal components, Re-engineered cage design to enhance durability, Entire axle made up of 4340 chromoly steel, Lithium based grease containing molybdenum disulfide and EP agent, Swing angle up to 47?, 2 year limited warranty