This Shimano XTR M9220 4-Piston Hydraulic Disc Brake Upgrade Kit combines the trail-tuned ergonomics and power modulation of BL-M9220 brake levers with the advanced stopping power of BR-M9220 brake calipers in an inclusive set that features nearly all materials needed to upgrade to the next-level performance of XTR. In the hand, BL-M9220 brake levers utilize refined ergonomics for a natural feel and a powerful sense of pull that features modulation that enables better trail control. BR-M9220 brake calipers express DH-capable power, consistency, and control; a revised low viscosity mineral oil formulation sustains a consistent bite point in all weather conditions. Features: - Enduro-focused hydraulic disc brake upgrade kit - XTR BL-M9220 levers demonstrate trail-focused shape and design - XTR BR-M9220 caliper acts with a DH-capable power curve that fits enduro riding demands - Low-viscosity mineral oil design creates reliable performance in all conditions - Rattle-free brake pad design features heat-dissipating fins - Includes Resin and Metal brake pad options