The Shimano Deore XT M8020 4 Pot Hydraulic Disc / Post Mount Front or Rear Brake Calliper is high performance hydraulic disc brake for efficient braking in all conditions.Shimano Deore XT M8020 Brake Calliper FeaturesFront or rear wheel use for International Standard or Post mount with adapters (not included)4 oversized phenolic pistons optimized for heat insulation, lightweight and stiffnessOpposed 4-piston design reduces leading effect and optimal pad wear increases braking controlIncreased pad to rotor clearance reduces the chance of rotor drag in muddy conditionsForged calliper design is lightweight and rigidOne way internal fluid circuit makes bleeding easyMineral oil brake fluid is non-corrosive and less hazardous than conventional hydraulic brake fluidShim-less mounting bracket allows for quick installation and setting upRecommended for use with Ice Tech Centre-Lock rotors for optimum braking performanceComes with G02A resin pads without fins